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Finding the Fourth Proportional to 79,705.48, 109,993.88 and 47,874.92

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Solution

The fourth proportional to 79,705.48, 109,993.88 and 47,874.92 is: 66,067.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,705.48 : 109,993.88 = 47,874.92 : x
  2. Step 2: Convert to fraction form
    79,705.48/109,993.88 = 47,874.92/x
  3. Step 3: Cross multiply
    79,705.48x = 109,993.88 × 47,874.92
  4. Step 4: Simplify right side
    79,705.48x = 5,265,948,205.49
  5. Step 5: Solve for x
    x = 5,265,948,205.49/79,705.48
  6. Step 6: Final answer
    x = 66,067.58

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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.