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Finding the Fourth Proportional to 62.21, 92.61 and 61.36

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Solution

The fourth proportional to 62.21, 92.61 and 61.36 is: 91.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.21 : 92.61 = 61.36 : x
  2. Step 2: Convert to fraction form
    62.21/92.61 = 61.36/x
  3. Step 3: Cross multiply
    62.21x = 92.61 × 61.36
  4. Step 4: Simplify right side
    62.21x = 5,682.09
  5. Step 5: Solve for x
    x = 5,682.09/62.21
  6. Step 6: Final answer
    x = 91.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.