Home / 80,761.71-121,143.06-28,171.25

Finding the Fourth Proportional to 80,761.71, 121,143.06 and 28,171.25

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Solution

The fourth proportional to 80,761.71, 121,143.06 and 28,171.25 is: 42,257.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,761.71 : 121,143.06 = 28,171.25 : x
  2. Step 2: Convert to fraction form
    80,761.71/121,143.06 = 28,171.25/x
  3. Step 3: Cross multiply
    80,761.71x = 121,143.06 × 28,171.25
  4. Step 4: Simplify right side
    80,761.71x = 3,412,750,823.31
  5. Step 5: Solve for x
    x = 3,412,750,823.31/80,761.71
  6. Step 6: Final answer
    x = 42,257.04

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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.