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Finding the Fourth Proportional to 79,321.92, 118,979.46 and 26,731.20

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Solution

The fourth proportional to 79,321.92, 118,979.46 and 26,731.20 is: 40,095.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,321.92 : 118,979.46 = 26,731.20 : x
  2. Step 2: Convert to fraction form
    79,321.92/118,979.46 = 26,731.20/x
  3. Step 3: Cross multiply
    79,321.92x = 118,979.46 × 26,731.20
  4. Step 4: Simplify right side
    79,321.92x = 3,180,463,741.15
  5. Step 5: Solve for x
    x = 3,180,463,741.15/79,321.92
  6. Step 6: Final answer
    x = 40,095.65

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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.