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Finding the Fourth Proportional to 80,978.97, 121,354.26 and 38,238.79

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Solution

The fourth proportional to 80,978.97, 121,354.26 and 38,238.79 is: 57,304.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,978.97 : 121,354.26 = 38,238.79 : x
  2. Step 2: Convert to fraction form
    80,978.97/121,354.26 = 38,238.79/x
  3. Step 3: Cross multiply
    80,978.97x = 121,354.26 × 38,238.79
  4. Step 4: Simplify right side
    80,978.97x = 4,640,440,063.75
  5. Step 5: Solve for x
    x = 4,640,440,063.75/80,978.97
  6. Step 6: Final answer
    x = 57,304.26

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.