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Finding the Fourth Proportional to 131,691, 197,489.76 and 47,428.56

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Solution

The fourth proportional to 131,691, 197,489.76 and 47,428.56 is: 71,126.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,691 : 197,489.76 = 47,428.56 : x
  2. Step 2: Convert to fraction form
    131,691/197,489.76 = 47,428.56/x
  3. Step 3: Cross multiply
    131,691x = 197,489.76 × 47,428.56
  4. Step 4: Simplify right side
    131,691x = 9,366,654,931.55
  5. Step 5: Solve for x
    x = 9,366,654,931.55/131,691
  6. Step 6: Final answer
    x = 71,126.01

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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.