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Finding the Fourth Proportional to 65,993.80, 91,084.68 and 39,151.20

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Solution

The fourth proportional to 65,993.80, 91,084.68 and 39,151.20 is: 54,036.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,993.80 : 91,084.68 = 39,151.20 : x
  2. Step 2: Convert to fraction form
    65,993.80/91,084.68 = 39,151.20/x
  3. Step 3: Cross multiply
    65,993.80x = 91,084.68 × 39,151.20
  4. Step 4: Simplify right side
    65,993.80x = 3,566,074,523.62
  5. Step 5: Solve for x
    x = 3,566,074,523.62/65,993.80
  6. Step 6: Final answer
    x = 54,036.51

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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.