Home / 80,843.13-121,264.29-20,871.54

Finding the Fourth Proportional to 80,843.13, 121,264.29 and 20,871.54

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Solution

The fourth proportional to 80,843.13, 121,264.29 and 20,871.54 is: 31,307.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,843.13 : 121,264.29 = 20,871.54 : x
  2. Step 2: Convert to fraction form
    80,843.13/121,264.29 = 20,871.54/x
  3. Step 3: Cross multiply
    80,843.13x = 121,264.29 × 20,871.54
  4. Step 4: Simplify right side
    80,843.13x = 2,530,972,479.31
  5. Step 5: Solve for x
    x = 2,530,972,479.31/80,843.13
  6. Step 6: Final answer
    x = 31,307.21

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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.