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Finding the Fourth Proportional to 111,542.82, 153,936.81 and 63,144.78

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Solution

The fourth proportional to 111,542.82, 153,936.81 and 63,144.78 is: 87,144.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,542.82 : 153,936.81 = 63,144.78 : x
  2. Step 2: Convert to fraction form
    111,542.82/153,936.81 = 63,144.78/x
  3. Step 3: Cross multiply
    111,542.82x = 153,936.81 × 63,144.78
  4. Step 4: Simplify right side
    111,542.82x = 9,720,306,001.35
  5. Step 5: Solve for x
    x = 9,720,306,001.35/111,542.82
  6. Step 6: Final answer
    x = 87,144.17

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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.