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Finding the Fourth Proportional to 87,692.80, 131,539.20 and 80,934.40

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Solution

The fourth proportional to 87,692.80, 131,539.20 and 80,934.40 is: 121,401.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,692.80 : 131,539.20 = 80,934.40 : x
  2. Step 2: Convert to fraction form
    87,692.80/131,539.20 = 80,934.40/x
  3. Step 3: Cross multiply
    87,692.80x = 131,539.20 × 80,934.40
  4. Step 4: Simplify right side
    87,692.80x = 10,646,046,228.48
  5. Step 5: Solve for x
    x = 10,646,046,228.48/87,692.80
  6. Step 6: Final answer
    x = 121,401.60

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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.