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Finding the Fourth Proportional to 84,712, 127,042.40 and 25,542.72

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Solution

The fourth proportional to 84,712, 127,042.40 and 25,542.72 is: 38,306.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,712 : 127,042.40 = 25,542.72 : x
  2. Step 2: Convert to fraction form
    84,712/127,042.40 = 25,542.72/x
  3. Step 3: Cross multiply
    84,712x = 127,042.40 × 25,542.72
  4. Step 4: Simplify right side
    84,712x = 3,245,008,451.33
  5. Step 5: Solve for x
    x = 3,245,008,451.33/84,712
  6. Step 6: Final answer
    x = 38,306.36

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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.