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Finding the Fourth Proportional to 159,207.66, 219,711.96 and 87,590.70

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Solution

The fourth proportional to 159,207.66, 219,711.96 and 87,590.70 is: 120,878.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,207.66 : 219,711.96 = 87,590.70 : x
  2. Step 2: Convert to fraction form
    159,207.66/219,711.96 = 87,590.70/x
  3. Step 3: Cross multiply
    159,207.66x = 219,711.96 × 87,590.70
  4. Step 4: Simplify right side
    159,207.66x = 19,244,724,374.77
  5. Step 5: Solve for x
    x = 19,244,724,374.77/159,207.66
  6. Step 6: Final answer
    x = 120,878.13

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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.