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Finding the Fourth Proportional to 71.20, 107.22 and 62.29

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Solution

The fourth proportional to 71.20, 107.22 and 62.29 is: 93.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.20 : 107.22 = 62.29 : x
  2. Step 2: Convert to fraction form
    71.20/107.22 = 62.29/x
  3. Step 3: Cross multiply
    71.20x = 107.22 × 62.29
  4. Step 4: Simplify right side
    71.20x = 6,678.73
  5. Step 5: Solve for x
    x = 6,678.73/71.20
  6. Step 6: Final answer
    x = 93.80

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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.