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Finding the Fourth Proportional to 88.84, 122.42 and 57.72

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Solution

The fourth proportional to 88.84, 122.42 and 57.72 is: 79.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.84 : 122.42 = 57.72 : x
  2. Step 2: Convert to fraction form
    88.84/122.42 = 57.72/x
  3. Step 3: Cross multiply
    88.84x = 122.42 × 57.72
  4. Step 4: Simplify right side
    88.84x = 7,066.08
  5. Step 5: Solve for x
    x = 7,066.08/88.84
  6. Step 6: Final answer
    x = 79.54

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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.