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Finding the Fourth Proportional to 85,305.96, 117,841.26 and 80,821.80

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Solution

The fourth proportional to 85,305.96, 117,841.26 and 80,821.80 is: 111,646.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,305.96 : 117,841.26 = 80,821.80 : x
  2. Step 2: Convert to fraction form
    85,305.96/117,841.26 = 80,821.80/x
  3. Step 3: Cross multiply
    85,305.96x = 117,841.26 × 80,821.80
  4. Step 4: Simplify right side
    85,305.96x = 9,524,142,747.47
  5. Step 5: Solve for x
    x = 9,524,142,747.47/85,305.96
  6. Step 6: Final answer
    x = 111,646.86

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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.