Home / 87,961.20-131,941.80-78,284.40

Finding the Fourth Proportional to 87,961.20, 131,941.80 and 78,284.40

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Solution

The fourth proportional to 87,961.20, 131,941.80 and 78,284.40 is: 117,426.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,961.20 : 131,941.80 = 78,284.40 : x
  2. Step 2: Convert to fraction form
    87,961.20/131,941.80 = 78,284.40/x
  3. Step 3: Cross multiply
    87,961.20x = 131,941.80 × 78,284.40
  4. Step 4: Simplify right side
    87,961.20x = 10,328,984,647.92
  5. Step 5: Solve for x
    x = 10,328,984,647.92/87,961.20
  6. Step 6: Final answer
    x = 117,426.60

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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.