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Finding the Fourth Proportional to 87,696, 131,478.30 and 28,496.34

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Solution

The fourth proportional to 87,696, 131,478.30 and 28,496.34 is: 42,723.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,696 : 131,478.30 = 28,496.34 : x
  2. Step 2: Convert to fraction form
    87,696/131,478.30 = 28,496.34/x
  3. Step 3: Cross multiply
    87,696x = 131,478.30 × 28,496.34
  4. Step 4: Simplify right side
    87,696x = 3,746,650,339.42
  5. Step 5: Solve for x
    x = 3,746,650,339.42/87,696
  6. Step 6: Final answer
    x = 42,723.16

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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.