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Finding the Fourth Proportional to 137,990.56, 206,990.70 and 53,757.04

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Solution

The fourth proportional to 137,990.56, 206,990.70 and 53,757.04 is: 80,637.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,990.56 : 206,990.70 = 53,757.04 : x
  2. Step 2: Convert to fraction form
    137,990.56/206,990.70 = 53,757.04/x
  3. Step 3: Cross multiply
    137,990.56x = 206,990.70 × 53,757.04
  4. Step 4: Simplify right side
    137,990.56x = 11,127,207,339.53
  5. Step 5: Solve for x
    x = 11,127,207,339.53/137,990.56
  6. Step 6: Final answer
    x = 80,637.45

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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.