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Finding the Fourth Proportional to 61.26, 84.18 and 58.38

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Solution

The fourth proportional to 61.26, 84.18 and 58.38 is: 80.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.26 : 84.18 = 58.38 : x
  2. Step 2: Convert to fraction form
    61.26/84.18 = 58.38/x
  3. Step 3: Cross multiply
    61.26x = 84.18 × 58.38
  4. Step 4: Simplify right side
    61.26x = 4,914.43
  5. Step 5: Solve for x
    x = 4,914.43/61.26
  6. Step 6: Final answer
    x = 80.22

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.