Home / 78,534.97-117,801.91-31,787.17

Finding the Fourth Proportional to 78,534.97, 117,801.91 and 31,787.17

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Solution

The fourth proportional to 78,534.97, 117,801.91 and 31,787.17 is: 47,680.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,534.97 : 117,801.91 = 31,787.17 : x
  2. Step 2: Convert to fraction form
    78,534.97/117,801.91 = 31,787.17/x
  3. Step 3: Cross multiply
    78,534.97x = 117,801.91 × 31,787.17
  4. Step 4: Simplify right side
    78,534.97x = 3,744,589,180.56
  5. Step 5: Solve for x
    x = 3,744,589,180.56/78,534.97
  6. Step 6: Final answer
    x = 47,680.53

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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.