Home / 81,132.20-121,609.20-28,514.60

Finding the Fourth Proportional to 81,132.20, 121,609.20 and 28,514.60

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Solution

The fourth proportional to 81,132.20, 121,609.20 and 28,514.60 is: 42,740.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,132.20 : 121,609.20 = 28,514.60 : x
  2. Step 2: Convert to fraction form
    81,132.20/121,609.20 = 28,514.60/x
  3. Step 3: Cross multiply
    81,132.20x = 121,609.20 × 28,514.60
  4. Step 4: Simplify right side
    81,132.20x = 3,467,637,694.32
  5. Step 5: Solve for x
    x = 3,467,637,694.32/81,132.20
  6. Step 6: Final answer
    x = 42,740.59

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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.