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Finding the Fourth Proportional to 193.30, 266.66 and 115.63

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Solution

The fourth proportional to 193.30, 266.66 and 115.63 is: 159.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.30 : 266.66 = 115.63 : x
  2. Step 2: Convert to fraction form
    193.30/266.66 = 115.63/x
  3. Step 3: Cross multiply
    193.30x = 266.66 × 115.63
  4. Step 4: Simplify right side
    193.30x = 30,831.98
  5. Step 5: Solve for x
    x = 30,831.98/193.30
  6. Step 6: Final answer
    x = 159.51

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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.