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Finding the Fourth Proportional to 88.57, 122.19 and 57.49

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Solution

The fourth proportional to 88.57, 122.19 and 57.49 is: 79.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.57 : 122.19 = 57.49 : x
  2. Step 2: Convert to fraction form
    88.57/122.19 = 57.49/x
  3. Step 3: Cross multiply
    88.57x = 122.19 × 57.49
  4. Step 4: Simplify right side
    88.57x = 7,024.09
  5. Step 5: Solve for x
    x = 7,024.09/88.57
  6. Step 6: Final answer
    x = 79.31

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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.