Home / 78,146.38-117,224.97-31,399.30

Finding the Fourth Proportional to 78,146.38, 117,224.97 and 31,399.30

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Solution

The fourth proportional to 78,146.38, 117,224.97 and 31,399.30 is: 47,101.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,146.38 : 117,224.97 = 31,399.30 : x
  2. Step 2: Convert to fraction form
    78,146.38/117,224.97 = 31,399.30/x
  3. Step 3: Cross multiply
    78,146.38x = 117,224.97 × 31,399.30
  4. Step 4: Simplify right side
    78,146.38x = 3,680,782,000.52
  5. Step 5: Solve for x
    x = 3,680,782,000.52/78,146.38
  6. Step 6: Final answer
    x = 47,101.12

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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.