Home / 78,013.25-117,023.20-30,638.61

Finding the Fourth Proportional to 78,013.25, 117,023.20 and 30,638.61

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Solution

The fourth proportional to 78,013.25, 117,023.20 and 30,638.61 is: 45,959.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,013.25 : 117,023.20 = 30,638.61 : x
  2. Step 2: Convert to fraction form
    78,013.25/117,023.20 = 30,638.61/x
  3. Step 3: Cross multiply
    78,013.25x = 117,023.20 × 30,638.61
  4. Step 4: Simplify right side
    78,013.25x = 3,585,427,524.04
  5. Step 5: Solve for x
    x = 3,585,427,524.04/78,013.25
  6. Step 6: Final answer
    x = 45,959.22

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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.