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Finding the Fourth Proportional to 70,198.60, 96,874.08 and 39,986.74

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Solution

The fourth proportional to 70,198.60, 96,874.08 and 39,986.74 is: 55,181.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,198.60 : 96,874.08 = 39,986.74 : x
  2. Step 2: Convert to fraction form
    70,198.60/96,874.08 = 39,986.74/x
  3. Step 3: Cross multiply
    70,198.60x = 96,874.08 × 39,986.74
  4. Step 4: Simplify right side
    70,198.60x = 3,873,678,649.70
  5. Step 5: Solve for x
    x = 3,873,678,649.70/70,198.60
  6. Step 6: Final answer
    x = 55,181.71

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1.5x scale

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.