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Finding the Fourth Proportional to 261,881.63, 392,845.07 and 72,341.92

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Solution

The fourth proportional to 261,881.63, 392,845.07 and 72,341.92 is: 108,519.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,881.63 : 392,845.07 = 72,341.92 : x
  2. Step 2: Convert to fraction form
    261,881.63/392,845.07 = 72,341.92/x
  3. Step 3: Cross multiply
    261,881.63x = 392,845.07 × 72,341.92
  4. Step 4: Simplify right side
    261,881.63x = 28,419,166,626.33
  5. Step 5: Solve for x
    x = 28,419,166,626.33/261,881.63
  6. Step 6: Final answer
    x = 108,519.13

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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.