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Finding the Fourth Proportional to 250,440.30, 345,605.67 and 137,262.78

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Solution

The fourth proportional to 250,440.30, 345,605.67 and 137,262.78 is: 189,421.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,440.30 : 345,605.67 = 137,262.78 : x
  2. Step 2: Convert to fraction form
    250,440.30/345,605.67 = 137,262.78/x
  3. Step 3: Cross multiply
    250,440.30x = 345,605.67 × 137,262.78
  4. Step 4: Simplify right side
    250,440.30x = 47,438,795,047.96
  5. Step 5: Solve for x
    x = 47,438,795,047.96/250,440.30
  6. Step 6: Final answer
    x = 189,421.57

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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.