Home / 80,721.20-121,080.57-36,316.59

Finding the Fourth Proportional to 80,721.20, 121,080.57 and 36,316.59

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Solution

The fourth proportional to 80,721.20, 121,080.57 and 36,316.59 is: 54,474.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,721.20 : 121,080.57 = 36,316.59 : x
  2. Step 2: Convert to fraction form
    80,721.20/121,080.57 = 36,316.59/x
  3. Step 3: Cross multiply
    80,721.20x = 121,080.57 × 36,316.59
  4. Step 4: Simplify right side
    80,721.20x = 4,397,233,417.66
  5. Step 5: Solve for x
    x = 4,397,233,417.66/80,721.20
  6. Step 6: Final answer
    x = 54,474.33

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1.5x scale

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.