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Finding the Fourth Proportional to 91,211.16, 137,024.28 and 65,988.48

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Solution

The fourth proportional to 91,211.16, 137,024.28 and 65,988.48 is: 99,132.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,211.16 : 137,024.28 = 65,988.48 : x
  2. Step 2: Convert to fraction form
    91,211.16/137,024.28 = 65,988.48/x
  3. Step 3: Cross multiply
    91,211.16x = 137,024.28 × 65,988.48
  4. Step 4: Simplify right side
    91,211.16x = 9,042,023,960.29
  5. Step 5: Solve for x
    x = 9,042,023,960.29/91,211.16
  6. Step 6: Final answer
    x = 99,132.87

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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.