Home / 81,139.05-121,708.61-21,974.76

Finding the Fourth Proportional to 81,139.05, 121,708.61 and 21,974.76

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Solution

The fourth proportional to 81,139.05, 121,708.61 and 21,974.76 is: 32,962.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,139.05 : 121,708.61 = 21,974.76 : x
  2. Step 2: Convert to fraction form
    81,139.05/121,708.61 = 21,974.76/x
  3. Step 3: Cross multiply
    81,139.05x = 121,708.61 × 21,974.76
  4. Step 4: Simplify right side
    81,139.05x = 2,674,517,467.22
  5. Step 5: Solve for x
    x = 2,674,517,467.22/81,139.05
  6. Step 6: Final answer
    x = 32,962.15

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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.