Home / 80,109.54-120,705.12-66,375.18

Finding the Fourth Proportional to 80,109.54, 120,705.12 and 66,375.18

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Solution

The fourth proportional to 80,109.54, 120,705.12 and 66,375.18 is: 100,010.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,109.54 : 120,705.12 = 66,375.18 : x
  2. Step 2: Convert to fraction form
    80,109.54/120,705.12 = 66,375.18/x
  3. Step 3: Cross multiply
    80,109.54x = 120,705.12 × 66,375.18
  4. Step 4: Simplify right side
    80,109.54x = 8,011,824,066.92
  5. Step 5: Solve for x
    x = 8,011,824,066.92/80,109.54
  6. Step 6: Final answer
    x = 100,010.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.