Home / 81,323.54-121,891.70-31,381.55

Finding the Fourth Proportional to 81,323.54, 121,891.70 and 31,381.55

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Solution

The fourth proportional to 81,323.54, 121,891.70 and 31,381.55 is: 47,036.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,323.54 : 121,891.70 = 31,381.55 : x
  2. Step 2: Convert to fraction form
    81,323.54/121,891.70 = 31,381.55/x
  3. Step 3: Cross multiply
    81,323.54x = 121,891.70 × 31,381.55
  4. Step 4: Simplify right side
    81,323.54x = 3,825,149,947.13
  5. Step 5: Solve for x
    x = 3,825,149,947.13/81,323.54
  6. Step 6: Final answer
    x = 47,036.20

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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.