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Finding the Fourth Proportional to 66,646.28, 91,971.92 and 38,351.97

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Solution

The fourth proportional to 66,646.28, 91,971.92 and 38,351.97 is: 52,925.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,646.28 : 91,971.92 = 38,351.97 : x
  2. Step 2: Convert to fraction form
    66,646.28/91,971.92 = 38,351.97/x
  3. Step 3: Cross multiply
    66,646.28x = 91,971.92 × 38,351.97
  4. Step 4: Simplify right side
    66,646.28x = 3,527,304,316.68
  5. Step 5: Solve for x
    x = 3,527,304,316.68/66,646.28
  6. Step 6: Final answer
    x = 52,925.75

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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.