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Finding the Fourth Proportional to 73,720.78, 110,581.92 and 18,316.78

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Solution

The fourth proportional to 73,720.78, 110,581.92 and 18,316.78 is: 27,475.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,720.78 : 110,581.92 = 18,316.78 : x
  2. Step 2: Convert to fraction form
    73,720.78/110,581.92 = 18,316.78/x
  3. Step 3: Cross multiply
    73,720.78x = 110,581.92 × 18,316.78
  4. Step 4: Simplify right side
    73,720.78x = 2,025,504,700.62
  5. Step 5: Solve for x
    x = 2,025,504,700.62/73,720.78
  6. Step 6: Final answer
    x = 27,475.36

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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.