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Finding the Fourth Proportional to 193.02, 266.31 and 137.76

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Solution

The fourth proportional to 193.02, 266.31 and 137.76 is: 190.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.02 : 266.31 = 137.76 : x
  2. Step 2: Convert to fraction form
    193.02/266.31 = 137.76/x
  3. Step 3: Cross multiply
    193.02x = 266.31 × 137.76
  4. Step 4: Simplify right side
    193.02x = 36,686.87
  5. Step 5: Solve for x
    x = 36,686.87/193.02
  6. Step 6: Final answer
    x = 190.07

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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.