Home / 78,517.83-108,308.43-49,399.89

Finding the Fourth Proportional to 78,517.83, 108,308.43 and 49,399.89

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Solution

The fourth proportional to 78,517.83, 108,308.43 and 49,399.89 is: 68,142.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,517.83 : 108,308.43 = 49,399.89 : x
  2. Step 2: Convert to fraction form
    78,517.83/108,308.43 = 49,399.89/x
  3. Step 3: Cross multiply
    78,517.83x = 108,308.43 × 49,399.89
  4. Step 4: Simplify right side
    78,517.83x = 5,350,424,528.07
  5. Step 5: Solve for x
    x = 5,350,424,528.07/78,517.83
  6. Step 6: Final answer
    x = 68,142.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.