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Finding the Fourth Proportional to 83,455.88, 125,188.14 and 21,126.92

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Solution

The fourth proportional to 83,455.88, 125,188.14 and 21,126.92 is: 31,691.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,455.88 : 125,188.14 = 21,126.92 : x
  2. Step 2: Convert to fraction form
    83,455.88/125,188.14 = 21,126.92/x
  3. Step 3: Cross multiply
    83,455.88x = 125,188.14 × 21,126.92
  4. Step 4: Simplify right side
    83,455.88x = 2,644,839,818.73
  5. Step 5: Solve for x
    x = 2,644,839,818.73/83,455.88
  6. Step 6: Final answer
    x = 31,691.47

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1.5x scale

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.