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Finding the Fourth Proportional to 100,583.37, 138,753 and 68,319.65

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Solution

The fourth proportional to 100,583.37, 138,753 and 68,319.65 is: 94,245.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,583.37 : 138,753 = 68,319.65 : x
  2. Step 2: Convert to fraction form
    100,583.37/138,753 = 68,319.65/x
  3. Step 3: Cross multiply
    100,583.37x = 138,753 × 68,319.65
  4. Step 4: Simplify right side
    100,583.37x = 9,479,556,743.33
  5. Step 5: Solve for x
    x = 9,479,556,743.33/100,583.37
  6. Step 6: Final answer
    x = 94,245.77

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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.