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Finding the Fourth Proportional to 74,265.97, 111,402.74 and 21,679.42

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Solution

The fourth proportional to 74,265.97, 111,402.74 and 21,679.42 is: 32,520.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,265.97 : 111,402.74 = 21,679.42 : x
  2. Step 2: Convert to fraction form
    74,265.97/111,402.74 = 21,679.42/x
  3. Step 3: Cross multiply
    74,265.97x = 111,402.74 × 21,679.42
  4. Step 4: Simplify right side
    74,265.97x = 2,415,146,789.61
  5. Step 5: Solve for x
    x = 2,415,146,789.61/74,265.97
  6. Step 6: Final answer
    x = 32,520.23

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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.