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Finding the Fourth Proportional to 100,584.37, 138,754.38 and 68,320.65

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Solution

The fourth proportional to 100,584.37, 138,754.38 and 68,320.65 is: 94,247.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,584.37 : 138,754.38 = 68,320.65 : x
  2. Step 2: Convert to fraction form
    100,584.37/138,754.38 = 68,320.65/x
  3. Step 3: Cross multiply
    100,584.37x = 138,754.38 × 68,320.65
  4. Step 4: Simplify right side
    100,584.37x = 9,479,789,431.95
  5. Step 5: Solve for x
    x = 9,479,789,431.95/100,584.37
  6. Step 6: Final answer
    x = 94,247.14

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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.