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Finding the Fourth Proportional to 85,760.44, 128,838.42 and 82,217.56

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Solution

The fourth proportional to 85,760.44, 128,838.42 and 82,217.56 is: 123,515.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,760.44 : 128,838.42 = 82,217.56 : x
  2. Step 2: Convert to fraction form
    85,760.44/128,838.42 = 82,217.56/x
  3. Step 3: Cross multiply
    85,760.44x = 128,838.42 × 82,217.56
  4. Step 4: Simplify right side
    85,760.44x = 10,592,780,526.66
  5. Step 5: Solve for x
    x = 10,592,780,526.66/85,760.44
  6. Step 6: Final answer
    x = 123,515.93

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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.