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Finding the Fourth Proportional to 66,939.62, 100,407.76 and 16,339.02

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Solution

The fourth proportional to 66,939.62, 100,407.76 and 16,339.02 is: 24,508.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,939.62 : 100,407.76 = 16,339.02 : x
  2. Step 2: Convert to fraction form
    66,939.62/100,407.76 = 16,339.02/x
  3. Step 3: Cross multiply
    66,939.62x = 100,407.76 × 16,339.02
  4. Step 4: Simplify right side
    66,939.62x = 1,640,564,398.80
  5. Step 5: Solve for x
    x = 1,640,564,398.80/66,939.62
  6. Step 6: Final answer
    x = 24,508.12

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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.