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Finding the Fourth Proportional to 159,310.82, 219,854.79 and 87,693.86

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Solution

The fourth proportional to 159,310.82, 219,854.79 and 87,693.86 is: 121,020.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,310.82 : 219,854.79 = 87,693.86 : x
  2. Step 2: Convert to fraction form
    159,310.82/219,854.79 = 87,693.86/x
  3. Step 3: Cross multiply
    159,310.82x = 219,854.79 × 87,693.86
  4. Step 4: Simplify right side
    159,310.82x = 19,279,915,174.59
  5. Step 5: Solve for x
    x = 19,279,915,174.59/159,310.82
  6. Step 6: Final answer
    x = 121,020.75

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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.