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Finding the Fourth Proportional to 66,108, 91,233.92 and 40,962.40

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Solution

The fourth proportional to 66,108, 91,233.92 and 40,962.40 is: 56,531.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,108 : 91,233.92 = 40,962.40 : x
  2. Step 2: Convert to fraction form
    66,108/91,233.92 = 40,962.40/x
  3. Step 3: Cross multiply
    66,108x = 91,233.92 × 40,962.40
  4. Step 4: Simplify right side
    66,108x = 3,737,160,324.61
  5. Step 5: Solve for x
    x = 3,737,160,324.61/66,108
  6. Step 6: Final answer
    x = 56,531.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.