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Finding the Fourth Proportional to 86,576.80, 129,865.20 and 80,999.95

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Solution

The fourth proportional to 86,576.80, 129,865.20 and 80,999.95 is: 121,499.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,576.80 : 129,865.20 = 80,999.95 : x
  2. Step 2: Convert to fraction form
    86,576.80/129,865.20 = 80,999.95/x
  3. Step 3: Cross multiply
    86,576.80x = 129,865.20 × 80,999.95
  4. Step 4: Simplify right side
    86,576.80x = 10,519,074,706.74
  5. Step 5: Solve for x
    x = 10,519,074,706.74/86,576.80
  6. Step 6: Final answer
    x = 121,499.93

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Similar ratio
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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.