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Finding the Fourth Proportional to 193.25, 290.01 and 85.07

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Solution

The fourth proportional to 193.25, 290.01 and 85.07 is: 127.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.25 : 290.01 = 85.07 : x
  2. Step 2: Convert to fraction form
    193.25/290.01 = 85.07/x
  3. Step 3: Cross multiply
    193.25x = 290.01 × 85.07
  4. Step 4: Simplify right side
    193.25x = 24,671.15
  5. Step 5: Solve for x
    x = 24,671.15/193.25
  6. Step 6: Final answer
    x = 127.66

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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.