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Finding the Fourth Proportional to 85,593.80, 128,388.30 and 38,846.60

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Solution

The fourth proportional to 85,593.80, 128,388.30 and 38,846.60 is: 58,268.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,593.80 : 128,388.30 = 38,846.60 : x
  2. Step 2: Convert to fraction form
    85,593.80/128,388.30 = 38,846.60/x
  3. Step 3: Cross multiply
    85,593.80x = 128,388.30 × 38,846.60
  4. Step 4: Simplify right side
    85,593.80x = 4,987,448,934.78
  5. Step 5: Solve for x
    x = 4,987,448,934.78/85,593.80
  6. Step 6: Final answer
    x = 58,268.81

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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.