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Finding the Fourth Proportional to 57,721.03, 86,590.20 and 20,274.50

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Solution

The fourth proportional to 57,721.03, 86,590.20 and 20,274.50 is: 30,414.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,721.03 : 86,590.20 = 20,274.50 : x
  2. Step 2: Convert to fraction form
    57,721.03/86,590.20 = 20,274.50/x
  3. Step 3: Cross multiply
    57,721.03x = 86,590.20 × 20,274.50
  4. Step 4: Simplify right side
    57,721.03x = 1,755,573,226.38
  5. Step 5: Solve for x
    x = 1,755,573,226.38/57,721.03
  6. Step 6: Final answer
    x = 30,414.79

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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.