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Finding the Fourth Proportional to 71,925.78, 99,258.88 and 40,091.25

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Solution

The fourth proportional to 71,925.78, 99,258.88 and 40,091.25 is: 55,326.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,925.78 : 99,258.88 = 40,091.25 : x
  2. Step 2: Convert to fraction form
    71,925.78/99,258.88 = 40,091.25/x
  3. Step 3: Cross multiply
    71,925.78x = 99,258.88 × 40,091.25
  4. Step 4: Simplify right side
    71,925.78x = 3,979,412,572.80
  5. Step 5: Solve for x
    x = 3,979,412,572.80/71,925.78
  6. Step 6: Final answer
    x = 55,326.65

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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.