Home / 87,660.60-131,490.90-78,329.40

Finding the Fourth Proportional to 87,660.60, 131,490.90 and 78,329.40

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Solution

The fourth proportional to 87,660.60, 131,490.90 and 78,329.40 is: 117,494.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,660.60 : 131,490.90 = 78,329.40 : x
  2. Step 2: Convert to fraction form
    87,660.60/131,490.90 = 78,329.40/x
  3. Step 3: Cross multiply
    87,660.60x = 131,490.90 × 78,329.40
  4. Step 4: Simplify right side
    87,660.60x = 10,299,603,302.46
  5. Step 5: Solve for x
    x = 10,299,603,302.46/87,660.60
  6. Step 6: Final answer
    x = 117,494.10

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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.