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Finding the Fourth Proportional to 69,836.65, 96,422.79 and 65,375.17

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Solution

The fourth proportional to 69,836.65, 96,422.79 and 65,375.17 is: 90,262.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,836.65 : 96,422.79 = 65,375.17 : x
  2. Step 2: Convert to fraction form
    69,836.65/96,422.79 = 65,375.17/x
  3. Step 3: Cross multiply
    69,836.65x = 96,422.79 × 65,375.17
  4. Step 4: Simplify right side
    69,836.65x = 6,303,656,288.12
  5. Step 5: Solve for x
    x = 6,303,656,288.12/69,836.65
  6. Step 6: Final answer
    x = 90,262.87

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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.