Home / 81,323.29-121,891.33-31,381.30

Finding the Fourth Proportional to 81,323.29, 121,891.33 and 31,381.30

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Solution

The fourth proportional to 81,323.29, 121,891.33 and 31,381.30 is: 47,035.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,323.29 : 121,891.33 = 31,381.30 : x
  2. Step 2: Convert to fraction form
    81,323.29/121,891.33 = 31,381.30/x
  3. Step 3: Cross multiply
    81,323.29x = 121,891.33 × 31,381.30
  4. Step 4: Simplify right side
    81,323.29x = 3,825,107,627.77
  5. Step 5: Solve for x
    x = 3,825,107,627.77/81,323.29
  6. Step 6: Final answer
    x = 47,035.82

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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.