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Finding the Fourth Proportional to 71,141.79, 98,171.41 and 38,869.97

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Solution

The fourth proportional to 71,141.79, 98,171.41 and 38,869.97 is: 53,638.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,141.79 : 98,171.41 = 38,869.97 : x
  2. Step 2: Convert to fraction form
    71,141.79/98,171.41 = 38,869.97/x
  3. Step 3: Cross multiply
    71,141.79x = 98,171.41 × 38,869.97
  4. Step 4: Simplify right side
    71,141.79x = 3,815,919,567.21
  5. Step 5: Solve for x
    x = 3,815,919,567.21/71,141.79
  6. Step 6: Final answer
    x = 53,638.23

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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.