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Finding the Fourth Proportional to 84,937.14, 127,388.70 and 80,721.90

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Solution

The fourth proportional to 84,937.14, 127,388.70 and 80,721.90 is: 121,066.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,937.14 : 127,388.70 = 80,721.90 : x
  2. Step 2: Convert to fraction form
    84,937.14/127,388.70 = 80,721.90/x
  3. Step 3: Cross multiply
    84,937.14x = 127,388.70 × 80,721.90
  4. Step 4: Simplify right side
    84,937.14x = 10,283,057,902.53
  5. Step 5: Solve for x
    x = 10,283,057,902.53/84,937.14
  6. Step 6: Final answer
    x = 121,066.68

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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.