Home / 81,207.40-121,724.70-31,268.20

Finding the Fourth Proportional to 81,207.40, 121,724.70 and 31,268.20

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Solution

The fourth proportional to 81,207.40, 121,724.70 and 31,268.20 is: 46,869.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,207.40 : 121,724.70 = 31,268.20 : x
  2. Step 2: Convert to fraction form
    81,207.40/121,724.70 = 31,268.20/x
  3. Step 3: Cross multiply
    81,207.40x = 121,724.70 × 31,268.20
  4. Step 4: Simplify right side
    81,207.40x = 3,806,112,264.54
  5. Step 5: Solve for x
    x = 3,806,112,264.54/81,207.40
  6. Step 6: Final answer
    x = 46,869.03

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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.