Home / 80,166.54-120,246.36-21,000.90

Finding the Fourth Proportional to 80,166.54, 120,246.36 and 21,000.90

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Solution

The fourth proportional to 80,166.54, 120,246.36 and 21,000.90 is: 31,500.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,166.54 : 120,246.36 = 21,000.90 : x
  2. Step 2: Convert to fraction form
    80,166.54/120,246.36 = 21,000.90/x
  3. Step 3: Cross multiply
    80,166.54x = 120,246.36 × 21,000.90
  4. Step 4: Simplify right side
    80,166.54x = 2,525,281,781.72
  5. Step 5: Solve for x
    x = 2,525,281,781.72/80,166.54
  6. Step 6: Final answer
    x = 31,500.45

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Half scale
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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.