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Finding the Fourth Proportional to 225,517, 311,223.72 and 124,915

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Solution

The fourth proportional to 225,517, 311,223.72 and 124,915 is: 172,388.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,517 : 311,223.72 = 124,915 : x
  2. Step 2: Convert to fraction form
    225,517/311,223.72 = 124,915/x
  3. Step 3: Cross multiply
    225,517x = 311,223.72 × 124,915
  4. Step 4: Simplify right side
    225,517x = 38,876,510,983.80
  5. Step 5: Solve for x
    x = 38,876,510,983.80/225,517
  6. Step 6: Final answer
    x = 172,388.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.