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Finding the Fourth Proportional to 225,580, 311,310.60 and 124,978

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Solution

The fourth proportional to 225,580, 311,310.60 and 124,978 is: 172,475.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,580 : 311,310.60 = 124,978 : x
  2. Step 2: Convert to fraction form
    225,580/311,310.60 = 124,978/x
  3. Step 3: Cross multiply
    225,580x = 311,310.60 × 124,978
  4. Step 4: Simplify right side
    225,580x = 38,906,976,166.80
  5. Step 5: Solve for x
    x = 38,906,976,166.80/225,580
  6. Step 6: Final answer
    x = 172,475.29

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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.