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Finding the Fourth Proportional to 86,791.79, 129,977.45 and 60,062.88

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Solution

The fourth proportional to 86,791.79, 129,977.45 and 60,062.88 is: 89,948.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,791.79 : 129,977.45 = 60,062.88 : x
  2. Step 2: Convert to fraction form
    86,791.79/129,977.45 = 60,062.88/x
  3. Step 3: Cross multiply
    86,791.79x = 129,977.45 × 60,062.88
  4. Step 4: Simplify right side
    86,791.79x = 7,806,819,906.98
  5. Step 5: Solve for x
    x = 7,806,819,906.98/86,791.79
  6. Step 6: Final answer
    x = 89,948.83

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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.