Home / 81,248.24-121,859.76-31,351.76

Finding the Fourth Proportional to 81,248.24, 121,859.76 and 31,351.76

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Solution

The fourth proportional to 81,248.24, 121,859.76 and 31,351.76 is: 47,022.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,248.24 : 121,859.76 = 31,351.76 : x
  2. Step 2: Convert to fraction form
    81,248.24/121,859.76 = 31,351.76/x
  3. Step 3: Cross multiply
    81,248.24x = 121,859.76 × 31,351.76
  4. Step 4: Simplify right side
    81,248.24x = 3,820,517,949.18
  5. Step 5: Solve for x
    x = 3,820,517,949.18/81,248.24
  6. Step 6: Final answer
    x = 47,022.78

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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.