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Finding the Fourth Proportional to 247,705.34, 371,297.79 and 121,170.78

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Solution

The fourth proportional to 247,705.34, 371,297.79 and 121,170.78 is: 181,628.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,705.34 : 371,297.79 = 121,170.78 : x
  2. Step 2: Convert to fraction form
    247,705.34/371,297.79 = 121,170.78/x
  3. Step 3: Cross multiply
    247,705.34x = 371,297.79 × 121,170.78
  4. Step 4: Simplify right side
    247,705.34x = 44,990,442,826.58
  5. Step 5: Solve for x
    x = 44,990,442,826.58/247,705.34
  6. Step 6: Final answer
    x = 181,628.88

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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.