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Finding the Fourth Proportional to 250,718.56, 345,985.68 and 137,540.32

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Solution

The fourth proportional to 250,718.56, 345,985.68 and 137,540.32 is: 189,802.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,718.56 : 345,985.68 = 137,540.32 : x
  2. Step 2: Convert to fraction form
    250,718.56/345,985.68 = 137,540.32/x
  3. Step 3: Cross multiply
    250,718.56x = 345,985.68 × 137,540.32
  4. Step 4: Simplify right side
    250,718.56x = 47,586,981,142.62
  5. Step 5: Solve for x
    x = 47,586,981,142.62/250,718.56
  6. Step 6: Final answer
    x = 189,802.39

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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.