Home / 80,764.49-121,132.13-28,189.01

Finding the Fourth Proportional to 80,764.49, 121,132.13 and 28,189.01

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Solution

The fourth proportional to 80,764.49, 121,132.13 and 28,189.01 is: 42,278.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,764.49 : 121,132.13 = 28,189.01 : x
  2. Step 2: Convert to fraction form
    80,764.49/121,132.13 = 28,189.01/x
  3. Step 3: Cross multiply
    80,764.49x = 121,132.13 × 28,189.01
  4. Step 4: Simplify right side
    80,764.49x = 3,414,594,077.29
  5. Step 5: Solve for x
    x = 3,414,594,077.29/80,764.49
  6. Step 6: Final answer
    x = 42,278.41

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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.