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Finding the Fourth Proportional to 80,720.68, 121,081.02 and 25,321

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Solution

The fourth proportional to 80,720.68, 121,081.02 and 25,321 is: 37,981.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,720.68 : 121,081.02 = 25,321 : x
  2. Step 2: Convert to fraction form
    80,720.68/121,081.02 = 25,321/x
  3. Step 3: Cross multiply
    80,720.68x = 121,081.02 × 25,321
  4. Step 4: Simplify right side
    80,720.68x = 3,065,892,507.42
  5. Step 5: Solve for x
    x = 3,065,892,507.42/80,720.68
  6. Step 6: Final answer
    x = 37,981.50

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Similar ratio
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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.