Home / 78,578.12-108,391.74-57,042.55

Finding the Fourth Proportional to 78,578.12, 108,391.74 and 57,042.55

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Solution

The fourth proportional to 78,578.12, 108,391.74 and 57,042.55 is: 78,685.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,578.12 : 108,391.74 = 57,042.55 : x
  2. Step 2: Convert to fraction form
    78,578.12/108,391.74 = 57,042.55/x
  3. Step 3: Cross multiply
    78,578.12x = 108,391.74 × 57,042.55
  4. Step 4: Simplify right side
    78,578.12x = 6,182,941,170.12
  5. Step 5: Solve for x
    x = 6,182,941,170.12/78,578.12
  6. Step 6: Final answer
    x = 78,685.27

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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.