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Finding the Fourth Proportional to 158,902.56, 219,279.64 and 87,278.31

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Solution

The fourth proportional to 158,902.56, 219,279.64 and 87,278.31 is: 120,440.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,902.56 : 219,279.64 = 87,278.31 : x
  2. Step 2: Convert to fraction form
    158,902.56/219,279.64 = 87,278.31/x
  3. Step 3: Cross multiply
    158,902.56x = 219,279.64 × 87,278.31
  4. Step 4: Simplify right side
    158,902.56x = 19,138,354,863.82
  5. Step 5: Solve for x
    x = 19,138,354,863.82/158,902.56
  6. Step 6: Final answer
    x = 120,440.83

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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.