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Finding the Fourth Proportional to 91,992.96, 138,251.88 and 45,278.64

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Solution

The fourth proportional to 91,992.96, 138,251.88 and 45,278.64 is: 68,047.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,992.96 : 138,251.88 = 45,278.64 : x
  2. Step 2: Convert to fraction form
    91,992.96/138,251.88 = 45,278.64/x
  3. Step 3: Cross multiply
    91,992.96x = 138,251.88 × 45,278.64
  4. Step 4: Simplify right side
    91,992.96x = 6,259,857,103.84
  5. Step 5: Solve for x
    x = 6,259,857,103.84/91,992.96
  6. Step 6: Final answer
    x = 68,047.13

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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.