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Finding the Fourth Proportional to 159,381.46, 219,945.90 and 87,761.62

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Solution

The fourth proportional to 159,381.46, 219,945.90 and 87,761.62 is: 121,110.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,381.46 : 219,945.90 = 87,761.62 : x
  2. Step 2: Convert to fraction form
    159,381.46/219,945.90 = 87,761.62/x
  3. Step 3: Cross multiply
    159,381.46x = 219,945.90 × 87,761.62
  4. Step 4: Simplify right side
    159,381.46x = 19,302,808,496.36
  5. Step 5: Solve for x
    x = 19,302,808,496.36/159,381.46
  6. Step 6: Final answer
    x = 121,110.75

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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.