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Finding the Fourth Proportional to 121,079.43, 166,914.65 and 80,175.11

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Solution

The fourth proportional to 121,079.43, 166,914.65 and 80,175.11 is: 110,525.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,079.43 : 166,914.65 = 80,175.11 : x
  2. Step 2: Convert to fraction form
    121,079.43/166,914.65 = 80,175.11/x
  3. Step 3: Cross multiply
    121,079.43x = 166,914.65 × 80,175.11
  4. Step 4: Simplify right side
    121,079.43x = 13,382,399,188.91
  5. Step 5: Solve for x
    x = 13,382,399,188.91/121,079.43
  6. Step 6: Final answer
    x = 110,525.79

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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.