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Finding the Fourth Proportional to 62.80, 94.78 and 61.18

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Solution

The fourth proportional to 62.80, 94.78 and 61.18 is: 92.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.80 : 94.78 = 61.18 : x
  2. Step 2: Convert to fraction form
    62.80/94.78 = 61.18/x
  3. Step 3: Cross multiply
    62.80x = 94.78 × 61.18
  4. Step 4: Simplify right side
    62.80x = 5,798.14
  5. Step 5: Solve for x
    x = 5,798.14/62.80
  6. Step 6: Final answer
    x = 92.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.