Home / 129,960.53-195,042.86-66,778.10

Finding the Fourth Proportional to 129,960.53, 195,042.86 and 66,778.10

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Solution

The fourth proportional to 129,960.53, 195,042.86 and 66,778.10 is: 100,219.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,960.53 : 195,042.86 = 66,778.10 : x
  2. Step 2: Convert to fraction form
    129,960.53/195,042.86 = 66,778.10/x
  3. Step 3: Cross multiply
    129,960.53x = 195,042.86 × 66,778.10
  4. Step 4: Simplify right side
    129,960.53x = 13,024,591,609.37
  5. Step 5: Solve for x
    x = 13,024,591,609.37/129,960.53
  6. Step 6: Final answer
    x = 100,219.59

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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.