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Finding the Fourth Proportional to 193.60, 290.52 and 71.87

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Solution

The fourth proportional to 193.60, 290.52 and 71.87 is: 107.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.60 : 290.52 = 71.87 : x
  2. Step 2: Convert to fraction form
    193.60/290.52 = 71.87/x
  3. Step 3: Cross multiply
    193.60x = 290.52 × 71.87
  4. Step 4: Simplify right side
    193.60x = 20,878.22
  5. Step 5: Solve for x
    x = 20,878.22/193.60
  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.