Home / 81,268.40-121,902.60-74,010.80

Finding the Fourth Proportional to 81,268.40, 121,902.60 and 74,010.80

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Solution

The fourth proportional to 81,268.40, 121,902.60 and 74,010.80 is: 111,016.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,268.40 : 121,902.60 = 74,010.80 : x
  2. Step 2: Convert to fraction form
    81,268.40/121,902.60 = 74,010.80/x
  3. Step 3: Cross multiply
    81,268.40x = 121,902.60 × 74,010.80
  4. Step 4: Simplify right side
    81,268.40x = 9,022,108,948.08
  5. Step 5: Solve for x
    x = 9,022,108,948.08/81,268.40
  6. Step 6: Final answer
    x = 111,016.20

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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.