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Finding the Fourth Proportional to 158,542.62, 218,783 and 86,921.08

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Solution

The fourth proportional to 158,542.62, 218,783 and 86,921.08 is: 119,947.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,542.62 : 218,783 = 86,921.08 : x
  2. Step 2: Convert to fraction form
    158,542.62/218,783 = 86,921.08/x
  3. Step 3: Cross multiply
    158,542.62x = 218,783 × 86,921.08
  4. Step 4: Simplify right side
    158,542.62x = 19,016,854,645.64
  5. Step 5: Solve for x
    x = 19,016,854,645.64/158,542.62
  6. Step 6: Final answer
    x = 119,947.90

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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.