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Finding the Fourth Proportional to 199.66, 275.57 and 140.93

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Solution

The fourth proportional to 199.66, 275.57 and 140.93 is: 194.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.66 : 275.57 = 140.93 : x
  2. Step 2: Convert to fraction form
    199.66/275.57 = 140.93/x
  3. Step 3: Cross multiply
    199.66x = 275.57 × 140.93
  4. Step 4: Simplify right side
    199.66x = 38,835.38
  5. Step 5: Solve for x
    x = 38,835.38/199.66
  6. Step 6: Final answer
    x = 194.51

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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.