Home / 260,017,430.30-390,026,145.45-87,436,886.30

Finding the Fourth Proportional to 260,017,430.30, 390,026,145.45 and 87,436,886.30

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Solution

The fourth proportional to 260,017,430.30, 390,026,145.45 and 87,436,886.30 is: 131,155,329.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,017,430.30 : 390,026,145.45 = 87,436,886.30 : x
  2. Step 2: Convert to fraction form
    260,017,430.30/390,026,145.45 = 87,436,886.30/x
  3. Step 3: Cross multiply
    260,017,430.30x = 390,026,145.45 × 87,436,886.30
  4. Step 4: Simplify right side
    260,017,430.30x = 34,102,671,733,738,912
  5. Step 5: Solve for x
    x = 34,102,671,733,738,912/260,017,430.30
  6. Step 6: Final answer
    x = 131,155,329.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.