Home / 121,760.20-167,920.27-76,442.41

Finding the Fourth Proportional to 121,760.20, 167,920.27 and 76,442.41

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Solution

The fourth proportional to 121,760.20, 167,920.27 and 76,442.41 is: 105,422.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,760.20 : 167,920.27 = 76,442.41 : x
  2. Step 2: Convert to fraction form
    121,760.20/167,920.27 = 76,442.41/x
  3. Step 3: Cross multiply
    121,760.20x = 167,920.27 × 76,442.41
  4. Step 4: Simplify right side
    121,760.20x = 12,836,230,126.65
  5. Step 5: Solve for x
    x = 12,836,230,126.65/121,760.20
  6. Step 6: Final answer
    x = 105,422.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.