Home / 81,311.71-121,979.18-25,156.61

Finding the Fourth Proportional to 81,311.71, 121,979.18 and 25,156.61

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Solution

The fourth proportional to 81,311.71, 121,979.18 and 25,156.61 is: 37,738.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,311.71 : 121,979.18 = 25,156.61 : x
  2. Step 2: Convert to fraction form
    81,311.71/121,979.18 = 25,156.61/x
  3. Step 3: Cross multiply
    81,311.71x = 121,979.18 × 25,156.61
  4. Step 4: Simplify right side
    81,311.71x = 3,068,583,027.22
  5. Step 5: Solve for x
    x = 3,068,583,027.22/81,311.71
  6. Step 6: Final answer
    x = 37,738.51

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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.