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Finding the Fourth Proportional to 144.72, 199.80 and 93.12

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Solution

The fourth proportional to 144.72, 199.80 and 93.12 is: 128.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.72 : 199.80 = 93.12 : x
  2. Step 2: Convert to fraction form
    144.72/199.80 = 93.12/x
  3. Step 3: Cross multiply
    144.72x = 199.80 × 93.12
  4. Step 4: Simplify right side
    144.72x = 18,605.38
  5. Step 5: Solve for x
    x = 18,605.38/144.72
  6. Step 6: Final answer
    x = 128.56

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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.