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Finding the Fourth Proportional to 115,843.40, 173,721.90 and 45,708.20

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Solution

The fourth proportional to 115,843.40, 173,721.90 and 45,708.20 is: 68,545.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,843.40 : 173,721.90 = 45,708.20 : x
  2. Step 2: Convert to fraction form
    115,843.40/173,721.90 = 45,708.20/x
  3. Step 3: Cross multiply
    115,843.40x = 173,721.90 × 45,708.20
  4. Step 4: Simplify right side
    115,843.40x = 7,940,515,349.58
  5. Step 5: Solve for x
    x = 7,940,515,349.58/115,843.40
  6. Step 6: Final answer
    x = 68,545.25

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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.