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Finding the Fourth Proportional to 261,703.80, 392,558.10 and 72,167.43

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Solution

The fourth proportional to 261,703.80, 392,558.10 and 72,167.43 is: 108,251.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,703.80 : 392,558.10 = 72,167.43 : x
  2. Step 2: Convert to fraction form
    261,703.80/392,558.10 = 72,167.43/x
  3. Step 3: Cross multiply
    261,703.80x = 392,558.10 × 72,167.43
  4. Step 4: Simplify right side
    261,703.80x = 28,329,909,202.68
  5. Step 5: Solve for x
    x = 28,329,909,202.68/261,703.80
  6. Step 6: Final answer
    x = 108,251.81

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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.