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Finding the Fourth Proportional to 159,091.29, 219,531.87 and 87,469.88

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Solution

The fourth proportional to 159,091.29, 219,531.87 and 87,469.88 is: 120,700.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,091.29 : 219,531.87 = 87,469.88 : x
  2. Step 2: Convert to fraction form
    159,091.29/219,531.87 = 87,469.88/x
  3. Step 3: Cross multiply
    159,091.29x = 219,531.87 × 87,469.88
  4. Step 4: Simplify right side
    159,091.29x = 19,202,425,227.42
  5. Step 5: Solve for x
    x = 19,202,425,227.42/159,091.29
  6. Step 6: Final answer
    x = 120,700.67

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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.