Home / 81,243.52-121,820-25,067.68

Finding the Fourth Proportional to 81,243.52, 121,820 and 25,067.68

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Solution

The fourth proportional to 81,243.52, 121,820 and 25,067.68 is: 37,587.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,243.52 : 121,820 = 25,067.68 : x
  2. Step 2: Convert to fraction form
    81,243.52/121,820 = 25,067.68/x
  3. Step 3: Cross multiply
    81,243.52x = 121,820 × 25,067.68
  4. Step 4: Simplify right side
    81,243.52x = 3,053,744,777.60
  5. Step 5: Solve for x
    x = 3,053,744,777.60/81,243.52
  6. Step 6: Final answer
    x = 37,587.55

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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.