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Finding the Fourth Proportional to 87,231.80, 130,847.70 and 80,492.60

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Solution

The fourth proportional to 87,231.80, 130,847.70 and 80,492.60 is: 120,738.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,231.80 : 130,847.70 = 80,492.60 : x
  2. Step 2: Convert to fraction form
    87,231.80/130,847.70 = 80,492.60/x
  3. Step 3: Cross multiply
    87,231.80x = 130,847.70 × 80,492.60
  4. Step 4: Simplify right side
    87,231.80x = 10,532,271,577.02
  5. Step 5: Solve for x
    x = 10,532,271,577.02/87,231.80
  6. Step 6: Final answer
    x = 120,738.90

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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.