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Finding the Fourth Proportional to 80,761, 121,146.36 and 25,357

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Solution

The fourth proportional to 80,761, 121,146.36 and 25,357 is: 38,037.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,761 : 121,146.36 = 25,357 : x
  2. Step 2: Convert to fraction form
    80,761/121,146.36 = 25,357/x
  3. Step 3: Cross multiply
    80,761x = 121,146.36 × 25,357
  4. Step 4: Simplify right side
    80,761x = 3,071,908,250.52
  5. Step 5: Solve for x
    x = 3,071,908,250.52/80,761
  6. Step 6: Final answer
    x = 38,037.03

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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.