Home / 156,539.20-234,938.40-72,428.80

Finding the Fourth Proportional to 156,539.20, 234,938.40 and 72,428.80

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Solution

The fourth proportional to 156,539.20, 234,938.40 and 72,428.80 is: 108,703.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,539.20 : 234,938.40 = 72,428.80 : x
  2. Step 2: Convert to fraction form
    156,539.20/234,938.40 = 72,428.80/x
  3. Step 3: Cross multiply
    156,539.20x = 234,938.40 × 72,428.80
  4. Step 4: Simplify right side
    156,539.20x = 17,016,306,385.92
  5. Step 5: Solve for x
    x = 17,016,306,385.92/156,539.20
  6. Step 6: Final answer
    x = 108,703.16

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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.