Home / 81,840.71-122,761.17-25,685.12

Finding the Fourth Proportional to 81,840.71, 122,761.17 and 25,685.12

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Solution

The fourth proportional to 81,840.71, 122,761.17 and 25,685.12 is: 38,527.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,840.71 : 122,761.17 = 25,685.12 : x
  2. Step 2: Convert to fraction form
    81,840.71/122,761.17 = 25,685.12/x
  3. Step 3: Cross multiply
    81,840.71x = 122,761.17 × 25,685.12
  4. Step 4: Simplify right side
    81,840.71x = 3,153,135,382.79
  5. Step 5: Solve for x
    x = 3,153,135,382.79/81,840.71
  6. Step 6: Final answer
    x = 38,527.71

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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.