Home / 121,108.32-167,034.80-78,680.52

Finding the Fourth Proportional to 121,108.32, 167,034.80 and 78,680.52

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Solution

The fourth proportional to 121,108.32, 167,034.80 and 78,680.52 is: 108,517.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,108.32 : 167,034.80 = 78,680.52 : x
  2. Step 2: Convert to fraction form
    121,108.32/167,034.80 = 78,680.52/x
  3. Step 3: Cross multiply
    121,108.32x = 167,034.80 × 78,680.52
  4. Step 4: Simplify right side
    121,108.32x = 13,142,384,922.10
  5. Step 5: Solve for x
    x = 13,142,384,922.10/121,108.32
  6. Step 6: Final answer
    x = 108,517.61

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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.