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Finding the Fourth Proportional to 137,819.48, 206,722.74 and 80,925.08

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Solution

The fourth proportional to 137,819.48, 206,722.74 and 80,925.08 is: 121,383.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,819.48 : 206,722.74 = 80,925.08 : x
  2. Step 2: Convert to fraction form
    137,819.48/206,722.74 = 80,925.08/x
  3. Step 3: Cross multiply
    137,819.48x = 206,722.74 × 80,925.08
  4. Step 4: Simplify right side
    137,819.48x = 16,729,054,272.32
  5. Step 5: Solve for x
    x = 16,729,054,272.32/137,819.48
  6. Step 6: Final answer
    x = 121,383.82

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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.