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Finding the Fourth Proportional to 66,915.31, 100,341.17 and 38,843.97

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Solution

The fourth proportional to 66,915.31, 100,341.17 and 38,843.97 is: 58,247.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,915.31 : 100,341.17 = 38,843.97 : x
  2. Step 2: Convert to fraction form
    66,915.31/100,341.17 = 38,843.97/x
  3. Step 3: Cross multiply
    66,915.31x = 100,341.17 × 38,843.97
  4. Step 4: Simplify right side
    66,915.31x = 3,897,649,203.03
  5. Step 5: Solve for x
    x = 3,897,649,203.03/66,915.31
  6. Step 6: Final answer
    x = 58,247.50

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1.5x scale

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.