Home / 87,960.80-131,941.20-81,202.40

Finding the Fourth Proportional to 87,960.80, 131,941.20 and 81,202.40

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Solution

The fourth proportional to 87,960.80, 131,941.20 and 81,202.40 is: 121,803.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,960.80 : 131,941.20 = 81,202.40 : x
  2. Step 2: Convert to fraction form
    87,960.80/131,941.20 = 81,202.40/x
  3. Step 3: Cross multiply
    87,960.80x = 131,941.20 × 81,202.40
  4. Step 4: Simplify right side
    87,960.80x = 10,713,942,098.88
  5. Step 5: Solve for x
    x = 10,713,942,098.88/87,960.80
  6. Step 6: Final answer
    x = 121,803.60

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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.