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Finding the Fourth Proportional to 159,789.31, 220,509 and 88,169.31

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Solution

The fourth proportional to 159,789.31, 220,509 and 88,169.31 is: 121,673.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,789.31 : 220,509 = 88,169.31 : x
  2. Step 2: Convert to fraction form
    159,789.31/220,509 = 88,169.31/x
  3. Step 3: Cross multiply
    159,789.31x = 220,509 × 88,169.31
  4. Step 4: Simplify right side
    159,789.31x = 19,442,126,378.79
  5. Step 5: Solve for x
    x = 19,442,126,378.79/159,789.31
  6. Step 6: Final answer
    x = 121,673.51

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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.