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Finding the Fourth Proportional to 144.45, 199.28 and 89.17

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Solution

The fourth proportional to 144.45, 199.28 and 89.17 is: 123.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.45 : 199.28 = 89.17 : x
  2. Step 2: Convert to fraction form
    144.45/199.28 = 89.17/x
  3. Step 3: Cross multiply
    144.45x = 199.28 × 89.17
  4. Step 4: Simplify right side
    144.45x = 17,769.94
  5. Step 5: Solve for x
    x = 17,769.94/144.45
  6. Step 6: Final answer
    x = 123.01

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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.