Home / 87,717.13-131,574.54-21,156.76

Finding the Fourth Proportional to 87,717.13, 131,574.54 and 21,156.76

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Solution

The fourth proportional to 87,717.13, 131,574.54 and 21,156.76 is: 31,734.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,717.13 : 131,574.54 = 21,156.76 : x
  2. Step 2: Convert to fraction form
    87,717.13/131,574.54 = 21,156.76/x
  3. Step 3: Cross multiply
    87,717.13x = 131,574.54 × 21,156.76
  4. Step 4: Simplify right side
    87,717.13x = 2,783,691,208.70
  5. Step 5: Solve for x
    x = 2,783,691,208.70/87,717.13
  6. Step 6: Final answer
    x = 31,734.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.