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Finding the Fourth Proportional to 193.10, 289.76 and 71.35

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Solution

The fourth proportional to 193.10, 289.76 and 71.35 is: 107.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.10 : 289.76 = 71.35 : x
  2. Step 2: Convert to fraction form
    193.10/289.76 = 71.35/x
  3. Step 3: Cross multiply
    193.10x = 289.76 × 71.35
  4. Step 4: Simplify right side
    193.10x = 20,674.38
  5. Step 5: Solve for x
    x = 20,674.38/193.10
  6. Step 6: Final answer
    x = 107.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.