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Finding the Fourth Proportional to 115,647.31, 173,343.44 and 75,649.69

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Solution

The fourth proportional to 115,647.31, 173,343.44 and 75,649.69 is: 113,391.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,647.31 : 173,343.44 = 75,649.69 : x
  2. Step 2: Convert to fraction form
    115,647.31/173,343.44 = 75,649.69/x
  3. Step 3: Cross multiply
    115,647.31x = 173,343.44 × 75,649.69
  4. Step 4: Simplify right side
    115,647.31x = 13,113,377,121.29
  5. Step 5: Solve for x
    x = 13,113,377,121.29/115,647.31
  6. Step 6: Final answer
    x = 113,391.11

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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.