Home / 78,127.78-117,206.24-25,540.14

Finding the Fourth Proportional to 78,127.78, 117,206.24 and 25,540.14

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Solution

The fourth proportional to 78,127.78, 117,206.24 and 25,540.14 is: 38,314.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,127.78 : 117,206.24 = 25,540.14 : x
  2. Step 2: Convert to fraction form
    78,127.78/117,206.24 = 25,540.14/x
  3. Step 3: Cross multiply
    78,127.78x = 117,206.24 × 25,540.14
  4. Step 4: Simplify right side
    78,127.78x = 2,993,463,778.47
  5. Step 5: Solve for x
    x = 2,993,463,778.47/78,127.78
  6. Step 6: Final answer
    x = 38,314.97

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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.