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Finding the Fourth Proportional to 159,091.32, 219,540.41 and 87,470.79

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Solution

The fourth proportional to 159,091.32, 219,540.41 and 87,470.79 is: 120,706.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,091.32 : 219,540.41 = 87,470.79 : x
  2. Step 2: Convert to fraction form
    159,091.32/219,540.41 = 87,470.79/x
  3. Step 3: Cross multiply
    159,091.32x = 219,540.41 × 87,470.79
  4. Step 4: Simplify right side
    159,091.32x = 19,203,371,838.99
  5. Step 5: Solve for x
    x = 19,203,371,838.99/159,091.32
  6. Step 6: Final answer
    x = 120,706.59

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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.