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Finding the Fourth Proportional to 137,989.56, 206,989.20 and 53,756.04

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Solution

The fourth proportional to 137,989.56, 206,989.20 and 53,756.04 is: 80,635.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,989.56 : 206,989.20 = 53,756.04 : x
  2. Step 2: Convert to fraction form
    137,989.56/206,989.20 = 53,756.04/x
  3. Step 3: Cross multiply
    137,989.56x = 206,989.20 × 53,756.04
  4. Step 4: Simplify right side
    137,989.56x = 11,126,919,714.77
  5. Step 5: Solve for x
    x = 11,126,919,714.77/137,989.56
  6. Step 6: Final answer
    x = 80,635.95

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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.