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Finding the Fourth Proportional to 163,712.88, 225,921.42 and 91,115.28

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Solution

The fourth proportional to 163,712.88, 225,921.42 and 91,115.28 is: 125,737.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,712.88 : 225,921.42 = 91,115.28 : x
  2. Step 2: Convert to fraction form
    163,712.88/225,921.42 = 91,115.28/x
  3. Step 3: Cross multiply
    163,712.88x = 225,921.42 × 91,115.28
  4. Step 4: Simplify right side
    163,712.88x = 20,584,893,441.30
  5. Step 5: Solve for x
    x = 20,584,893,441.30/163,712.88
  6. Step 6: Final answer
    x = 125,737.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.