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Finding the Fourth Proportional to 144.08, 198.95 and 123.56

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Solution

The fourth proportional to 144.08, 198.95 and 123.56 is: 170.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.08 : 198.95 = 123.56 : x
  2. Step 2: Convert to fraction form
    144.08/198.95 = 123.56/x
  3. Step 3: Cross multiply
    144.08x = 198.95 × 123.56
  4. Step 4: Simplify right side
    144.08x = 24,582.26
  5. Step 5: Solve for x
    x = 24,582.26/144.08
  6. Step 6: Final answer
    x = 170.62

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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.