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Finding the Fourth Proportional to 193.59, 290.43 and 71.88

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Solution

The fourth proportional to 193.59, 290.43 and 71.88 is: 107.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.59 : 290.43 = 71.88 : x
  2. Step 2: Convert to fraction form
    193.59/290.43 = 71.88/x
  3. Step 3: Cross multiply
    193.59x = 290.43 × 71.88
  4. Step 4: Simplify right side
    193.59x = 20,875.75
  5. Step 5: Solve for x
    x = 20,875.75/193.59
  6. Step 6: Final answer
    x = 107.84

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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.