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Finding the Fourth Proportional to 85,991.82, 129,037.55 and 36,067.47

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Solution

The fourth proportional to 85,991.82, 129,037.55 and 36,067.47 is: 54,122.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,991.82 : 129,037.55 = 36,067.47 : x
  2. Step 2: Convert to fraction form
    85,991.82/129,037.55 = 36,067.47/x
  3. Step 3: Cross multiply
    85,991.82x = 129,037.55 × 36,067.47
  4. Step 4: Simplify right side
    85,991.82x = 4,654,057,783.16
  5. Step 5: Solve for x
    x = 4,654,057,783.16/85,991.82
  6. Step 6: Final answer
    x = 54,122.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.