Home / 81,324.90-121,987.56-53,268.48

Finding the Fourth Proportional to 81,324.90, 121,987.56 and 53,268.48

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Solution

The fourth proportional to 81,324.90, 121,987.56 and 53,268.48 is: 79,902.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,324.90 : 121,987.56 = 53,268.48 : x
  2. Step 2: Convert to fraction form
    81,324.90/121,987.56 = 53,268.48/x
  3. Step 3: Cross multiply
    81,324.90x = 121,987.56 × 53,268.48
  4. Step 4: Simplify right side
    81,324.90x = 6,498,091,900.11
  5. Step 5: Solve for x
    x = 6,498,091,900.11/81,324.90
  6. Step 6: Final answer
    x = 79,902.86

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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.