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Finding the Fourth Proportional to 70,186.57, 96,874.68 and 39,989.71

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Solution

The fourth proportional to 70,186.57, 96,874.68 and 39,989.71 is: 55,195.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,186.57 : 96,874.68 = 39,989.71 : x
  2. Step 2: Convert to fraction form
    70,186.57/96,874.68 = 39,989.71/x
  3. Step 3: Cross multiply
    70,186.57x = 96,874.68 × 39,989.71
  4. Step 4: Simplify right side
    70,186.57x = 3,873,990,359.54
  5. Step 5: Solve for x
    x = 3,873,990,359.54/70,186.57
  6. Step 6: Final answer
    x = 55,195.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.