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Finding the Fourth Proportional to 261,773.92, 392,611.20 and 72,187.44

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Solution

The fourth proportional to 261,773.92, 392,611.20 and 72,187.44 is: 108,267.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,773.92 : 392,611.20 = 72,187.44 : x
  2. Step 2: Convert to fraction form
    261,773.92/392,611.20 = 72,187.44/x
  3. Step 3: Cross multiply
    261,773.92x = 392,611.20 × 72,187.44
  4. Step 4: Simplify right side
    261,773.92x = 28,341,597,443.33
  5. Step 5: Solve for x
    x = 28,341,597,443.33/261,773.92
  6. Step 6: Final answer
    x = 108,267.46

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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.