Home / 260,109.20-390,185.40-102,342.80

Finding the Fourth Proportional to 260,109.20, 390,185.40 and 102,342.80

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Solution

The fourth proportional to 260,109.20, 390,185.40 and 102,342.80 is: 153,522.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,109.20 : 390,185.40 = 102,342.80 : x
  2. Step 2: Convert to fraction form
    260,109.20/390,185.40 = 102,342.80/x
  3. Step 3: Cross multiply
    260,109.20x = 390,185.40 × 102,342.80
  4. Step 4: Simplify right side
    260,109.20x = 39,932,666,355.12
  5. Step 5: Solve for x
    x = 39,932,666,355.12/260,109.20
  6. Step 6: Final answer
    x = 153,522.70

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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.