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Finding the Fourth Proportional to 66,915.95, 100,342.15 and 38,844.61

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Solution

The fourth proportional to 66,915.95, 100,342.15 and 38,844.61 is: 58,248.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,915.95 : 100,342.15 = 38,844.61 : x
  2. Step 2: Convert to fraction form
    66,915.95/100,342.15 = 38,844.61/x
  3. Step 3: Cross multiply
    66,915.95x = 100,342.15 × 38,844.61
  4. Step 4: Simplify right side
    66,915.95x = 3,897,751,683.31
  5. Step 5: Solve for x
    x = 3,897,751,683.31/66,915.95
  6. Step 6: Final answer
    x = 58,248.47

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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.