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Finding the Fourth Proportional to 61.33, 91.90 and 52.22

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Solution

The fourth proportional to 61.33, 91.90 and 52.22 is: 78.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.33 : 91.90 = 52.22 : x
  2. Step 2: Convert to fraction form
    61.33/91.90 = 52.22/x
  3. Step 3: Cross multiply
    61.33x = 91.90 × 52.22
  4. Step 4: Simplify right side
    61.33x = 4,799.02
  5. Step 5: Solve for x
    x = 4,799.02/61.33
  6. Step 6: Final answer
    x = 78.25

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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.