Home / 87,660.10-131,490.15-78,328.90

Finding the Fourth Proportional to 87,660.10, 131,490.15 and 78,328.90

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Solution

The fourth proportional to 87,660.10, 131,490.15 and 78,328.90 is: 117,493.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,660.10 : 131,490.15 = 78,328.90 : x
  2. Step 2: Convert to fraction form
    87,660.10/131,490.15 = 78,328.90/x
  3. Step 3: Cross multiply
    87,660.10x = 131,490.15 × 78,328.90
  4. Step 4: Simplify right side
    87,660.10x = 10,299,478,810.34
  5. Step 5: Solve for x
    x = 10,299,478,810.34/87,660.10
  6. Step 6: Final answer
    x = 117,493.35

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1.5x scale

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.