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Finding the Fourth Proportional to 80,874.93, 121,349.97 and 30,938.52

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Solution

The fourth proportional to 80,874.93, 121,349.97 and 30,938.52 is: 46,422.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,874.93 : 121,349.97 = 30,938.52 : x
  2. Step 2: Convert to fraction form
    80,874.93/121,349.97 = 30,938.52/x
  3. Step 3: Cross multiply
    80,874.93x = 121,349.97 × 30,938.52
  4. Step 4: Simplify right side
    80,874.93x = 3,754,388,473.84
  5. Step 5: Solve for x
    x = 3,754,388,473.84/80,874.93
  6. Step 6: Final answer
    x = 46,422.15

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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.