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Finding the Fourth Proportional to 79,406.64, 118,854 and 43,812

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Solution

The fourth proportional to 79,406.64, 118,854 and 43,812 is: 65,576.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,406.64 : 118,854 = 43,812 : x
  2. Step 2: Convert to fraction form
    79,406.64/118,854 = 43,812/x
  3. Step 3: Cross multiply
    79,406.64x = 118,854 × 43,812
  4. Step 4: Simplify right side
    79,406.64x = 5,207,231,448
  5. Step 5: Solve for x
    x = 5,207,231,448/79,406.64
  6. Step 6: Final answer
    x = 65,576.78

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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.