Home / 91,115.15-125,732.79-57,122.28

Finding the Fourth Proportional to 91,115.15, 125,732.79 and 57,122.28

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Solution

The fourth proportional to 91,115.15, 125,732.79 and 57,122.28 is: 78,824.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,115.15 : 125,732.79 = 57,122.28 : x
  2. Step 2: Convert to fraction form
    91,115.15/125,732.79 = 57,122.28/x
  3. Step 3: Cross multiply
    91,115.15x = 125,732.79 × 57,122.28
  4. Step 4: Simplify right side
    91,115.15x = 7,182,143,635.56
  5. Step 5: Solve for x
    x = 7,182,143,635.56/91,115.15
  6. Step 6: Final answer
    x = 78,824.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.