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Finding the Fourth Proportional to 158,512.11, 218,747.69 and 86,891.91

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Solution

The fourth proportional to 158,512.11, 218,747.69 and 86,891.91 is: 119,911.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,512.11 : 218,747.69 = 86,891.91 : x
  2. Step 2: Convert to fraction form
    158,512.11/218,747.69 = 86,891.91/x
  3. Step 3: Cross multiply
    158,512.11x = 218,747.69 × 86,891.91
  4. Step 4: Simplify right side
    158,512.11x = 19,007,404,592.19
  5. Step 5: Solve for x
    x = 19,007,404,592.19/158,512.11
  6. Step 6: Final answer
    x = 119,911.37

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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.