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Finding the Fourth Proportional to 183.62, 253.39 and 100.72

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Solution

The fourth proportional to 183.62, 253.39 and 100.72 is: 138.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.62 : 253.39 = 100.72 : x
  2. Step 2: Convert to fraction form
    183.62/253.39 = 100.72/x
  3. Step 3: Cross multiply
    183.62x = 253.39 × 100.72
  4. Step 4: Simplify right side
    183.62x = 25,521.44
  5. Step 5: Solve for x
    x = 25,521.44/183.62
  6. Step 6: Final answer
    x = 138.99

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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.