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Finding the Fourth Proportional to 80,617.85, 111,210.14 and 47,893.58

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Solution

The fourth proportional to 80,617.85, 111,210.14 and 47,893.58 is: 66,067.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,617.85 : 111,210.14 = 47,893.58 : x
  2. Step 2: Convert to fraction form
    80,617.85/111,210.14 = 47,893.58/x
  3. Step 3: Cross multiply
    80,617.85x = 111,210.14 × 47,893.58
  4. Step 4: Simplify right side
    80,617.85x = 5,326,251,497.43
  5. Step 5: Solve for x
    x = 5,326,251,497.43/80,617.85
  6. Step 6: Final answer
    x = 66,067.89

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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.