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Finding the Fourth Proportional to 88.49, 122.21 and 57.41

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Solution

The fourth proportional to 88.49, 122.21 and 57.41 is: 79.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.49 : 122.21 = 57.41 : x
  2. Step 2: Convert to fraction form
    88.49/122.21 = 57.41/x
  3. Step 3: Cross multiply
    88.49x = 122.21 × 57.41
  4. Step 4: Simplify right side
    88.49x = 7,015.85
  5. Step 5: Solve for x
    x = 7,015.85/88.49
  6. Step 6: Final answer
    x = 79.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.