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Finding the Fourth Proportional to 66,418.58, 99,668.88 and 38,394

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Solution

The fourth proportional to 66,418.58, 99,668.88 and 38,394 is: 57,614.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,418.58 : 99,668.88 = 38,394 : x
  2. Step 2: Convert to fraction form
    66,418.58/99,668.88 = 38,394/x
  3. Step 3: Cross multiply
    66,418.58x = 99,668.88 × 38,394
  4. Step 4: Simplify right side
    66,418.58x = 3,826,686,978.72
  5. Step 5: Solve for x
    x = 3,826,686,978.72/66,418.58
  6. Step 6: Final answer
    x = 57,614.70

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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.