Home / 87,998.10-131,705.55-80,999.70

Finding the Fourth Proportional to 87,998.10, 131,705.55 and 80,999.70

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Solution

The fourth proportional to 87,998.10, 131,705.55 and 80,999.70 is: 121,231.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,998.10 : 131,705.55 = 80,999.70 : x
  2. Step 2: Convert to fraction form
    87,998.10/131,705.55 = 80,999.70/x
  3. Step 3: Cross multiply
    87,998.10x = 131,705.55 × 80,999.70
  4. Step 4: Simplify right side
    87,998.10x = 10,668,110,038.34
  5. Step 5: Solve for x
    x = 10,668,110,038.34/87,998.10
  6. Step 6: Final answer
    x = 121,231.14

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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.