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Finding the Fourth Proportional to 91,371.92, 136,988.42 and 63,217.13

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Solution

The fourth proportional to 91,371.92, 136,988.42 and 63,217.13 is: 94,777.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,371.92 : 136,988.42 = 63,217.13 : x
  2. Step 2: Convert to fraction form
    91,371.92/136,988.42 = 63,217.13/x
  3. Step 3: Cross multiply
    91,371.92x = 136,988.42 × 63,217.13
  4. Step 4: Simplify right side
    91,371.92x = 8,660,013,754.61
  5. Step 5: Solve for x
    x = 8,660,013,754.61/91,371.92
  6. Step 6: Final answer
    x = 94,777.63

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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.