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Finding the Fourth Proportional to 439,425.12, 659,104.20 and 139,915.20

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Solution

The fourth proportional to 439,425.12, 659,104.20 and 139,915.20 is: 209,862.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,425.12 : 659,104.20 = 139,915.20 : x
  2. Step 2: Convert to fraction form
    439,425.12/659,104.20 = 139,915.20/x
  3. Step 3: Cross multiply
    439,425.12x = 659,104.20 × 139,915.20
  4. Step 4: Simplify right side
    439,425.12x = 92,218,695,963.84
  5. Step 5: Solve for x
    x = 92,218,695,963.84/439,425.12
  6. Step 6: Final answer
    x = 209,862.14

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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.