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Finding the Fourth Proportional to 137,489.80, 206,234.70 and 122,456.20

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Solution

The fourth proportional to 137,489.80, 206,234.70 and 122,456.20 is: 183,684.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,489.80 : 206,234.70 = 122,456.20 : x
  2. Step 2: Convert to fraction form
    137,489.80/206,234.70 = 122,456.20/x
  3. Step 3: Cross multiply
    137,489.80x = 206,234.70 × 122,456.20
  4. Step 4: Simplify right side
    137,489.80x = 25,254,717,670.14
  5. Step 5: Solve for x
    x = 25,254,717,670.14/137,489.80
  6. Step 6: Final answer
    x = 183,684.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.