Home / 79,987.32-120,040.38-30,116.52

Finding the Fourth Proportional to 79,987.32, 120,040.38 and 30,116.52

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Solution

The fourth proportional to 79,987.32, 120,040.38 and 30,116.52 is: 45,197.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,987.32 : 120,040.38 = 30,116.52 : x
  2. Step 2: Convert to fraction form
    79,987.32/120,040.38 = 30,116.52/x
  3. Step 3: Cross multiply
    79,987.32x = 120,040.38 × 30,116.52
  4. Step 4: Simplify right side
    79,987.32x = 3,615,198,505.08
  5. Step 5: Solve for x
    x = 3,615,198,505.08/79,987.32
  6. Step 6: Final answer
    x = 45,197.15

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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.