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Finding the Fourth Proportional to 261,766.92, 392,600.67 and 72,180.42

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Solution

The fourth proportional to 261,766.92, 392,600.67 and 72,180.42 is: 108,256.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,766.92 : 392,600.67 = 72,180.42 : x
  2. Step 2: Convert to fraction form
    261,766.92/392,600.67 = 72,180.42/x
  3. Step 3: Cross multiply
    261,766.92x = 392,600.67 × 72,180.42
  4. Step 4: Simplify right side
    261,766.92x = 28,338,081,252.88
  5. Step 5: Solve for x
    x = 28,338,081,252.88/261,766.92
  6. Step 6: Final answer
    x = 108,256.92

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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.