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Finding the Fourth Proportional to 137,902.80, 206,335.80 and 91,246.80

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Solution

The fourth proportional to 137,902.80, 206,335.80 and 91,246.80 is: 136,527.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,902.80 : 206,335.80 = 91,246.80 : x
  2. Step 2: Convert to fraction form
    137,902.80/206,335.80 = 91,246.80/x
  3. Step 3: Cross multiply
    137,902.80x = 206,335.80 × 91,246.80
  4. Step 4: Simplify right side
    137,902.80x = 18,827,481,475.44
  5. Step 5: Solve for x
    x = 18,827,481,475.44/137,902.80
  6. Step 6: Final answer
    x = 136,527.19

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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.