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Finding the Fourth Proportional to 158,863.98, 219,231.72 and 87,248.64

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Solution

The fourth proportional to 158,863.98, 219,231.72 and 87,248.64 is: 120,402.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,863.98 : 219,231.72 = 87,248.64 : x
  2. Step 2: Convert to fraction form
    158,863.98/219,231.72 = 87,248.64/x
  3. Step 3: Cross multiply
    158,863.98x = 219,231.72 × 87,248.64
  4. Step 4: Simplify right side
    158,863.98x = 19,127,669,414.86
  5. Step 5: Solve for x
    x = 19,127,669,414.86/158,863.98
  6. Step 6: Final answer
    x = 120,402.81

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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.