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Finding the Fourth Proportional to 250,668.84, 345,921.12 and 137,490.78

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Solution

The fourth proportional to 250,668.84, 345,921.12 and 137,490.78 is: 189,736.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,668.84 : 345,921.12 = 137,490.78 : x
  2. Step 2: Convert to fraction form
    250,668.84/345,921.12 = 137,490.78/x
  3. Step 3: Cross multiply
    250,668.84x = 345,921.12 × 137,490.78
  4. Step 4: Simplify right side
    250,668.84x = 47,560,964,607.27
  5. Step 5: Solve for x
    x = 47,560,964,607.27/250,668.84
  6. Step 6: Final answer
    x = 189,736.25

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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.