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Finding the Fourth Proportional to 156,539.70, 234,939.15 and 72,429.30

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Solution

The fourth proportional to 156,539.70, 234,939.15 and 72,429.30 is: 108,703.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,539.70 : 234,939.15 = 72,429.30 : x
  2. Step 2: Convert to fraction form
    156,539.70/234,939.15 = 72,429.30/x
  3. Step 3: Cross multiply
    156,539.70x = 234,939.15 × 72,429.30
  4. Step 4: Simplify right side
    156,539.70x = 17,016,478,177.10
  5. Step 5: Solve for x
    x = 17,016,478,177.10/156,539.70
  6. Step 6: Final answer
    x = 108,703.91

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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.