Home / 80,721.82-121,081.51-36,317.22

Finding the Fourth Proportional to 80,721.82, 121,081.51 and 36,317.22

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Solution

The fourth proportional to 80,721.82, 121,081.51 and 36,317.22 is: 54,475.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,721.82 : 121,081.51 = 36,317.22 : x
  2. Step 2: Convert to fraction form
    80,721.82/121,081.51 = 36,317.22/x
  3. Step 3: Cross multiply
    80,721.82x = 121,081.51 × 36,317.22
  4. Step 4: Simplify right side
    80,721.82x = 4,397,343,836.60
  5. Step 5: Solve for x
    x = 4,397,343,836.60/80,721.82
  6. Step 6: Final answer
    x = 54,475.28

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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.