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Finding the Fourth Proportional to 121,452.64, 167,520 and 80,609.20

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Solution

The fourth proportional to 121,452.64, 167,520 and 80,609.20 is: 111,184.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,452.64 : 167,520 = 80,609.20 : x
  2. Step 2: Convert to fraction form
    121,452.64/167,520 = 80,609.20/x
  3. Step 3: Cross multiply
    121,452.64x = 167,520 × 80,609.20
  4. Step 4: Simplify right side
    121,452.64x = 13,503,653,184
  5. Step 5: Solve for x
    x = 13,503,653,184/121,452.64
  6. Step 6: Final answer
    x = 111,184.52

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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.