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Finding the Fourth Proportional to 66,913.20, 100,338.02 and 38,841.86

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Solution

The fourth proportional to 66,913.20, 100,338.02 and 38,841.86 is: 58,244.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,913.20 : 100,338.02 = 38,841.86 : x
  2. Step 2: Convert to fraction form
    66,913.20/100,338.02 = 38,841.86/x
  3. Step 3: Cross multiply
    66,913.20x = 100,338.02 × 38,841.86
  4. Step 4: Simplify right side
    66,913.20x = 3,897,315,325.52
  5. Step 5: Solve for x
    x = 3,897,315,325.52/66,913.20
  6. Step 6: Final answer
    x = 58,244.34

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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.