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Finding the Fourth Proportional to 56,691.80, 85,034.10 and 19,251.80

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Solution

The fourth proportional to 56,691.80, 85,034.10 and 19,251.80 is: 28,876.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,691.80 : 85,034.10 = 19,251.80 : x
  2. Step 2: Convert to fraction form
    56,691.80/85,034.10 = 19,251.80/x
  3. Step 3: Cross multiply
    56,691.80x = 85,034.10 × 19,251.80
  4. Step 4: Simplify right side
    56,691.80x = 1,637,059,486.38
  5. Step 5: Solve for x
    x = 1,637,059,486.38/56,691.80
  6. Step 6: Final answer
    x = 28,876.48

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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.