Home / 87,622.10-131,260.35-81,401.30

Finding the Fourth Proportional to 87,622.10, 131,260.35 and 81,401.30

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Solution

The fourth proportional to 87,622.10, 131,260.35 and 81,401.30 is: 121,941.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,622.10 : 131,260.35 = 81,401.30 : x
  2. Step 2: Convert to fraction form
    87,622.10/131,260.35 = 81,401.30/x
  3. Step 3: Cross multiply
    87,622.10x = 131,260.35 × 81,401.30
  4. Step 4: Simplify right side
    87,622.10x = 10,684,763,128.46
  5. Step 5: Solve for x
    x = 10,684,763,128.46/87,622.10
  6. Step 6: Final answer
    x = 121,941.42

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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.