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Finding the Fourth Proportional to 88.74, 122.37 and 62.88

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Solution

The fourth proportional to 88.74, 122.37 and 62.88 is: 86.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.74 : 122.37 = 62.88 : x
  2. Step 2: Convert to fraction form
    88.74/122.37 = 62.88/x
  3. Step 3: Cross multiply
    88.74x = 122.37 × 62.88
  4. Step 4: Simplify right side
    88.74x = 7,694.63
  5. Step 5: Solve for x
    x = 7,694.63/88.74
  6. Step 6: Final answer
    x = 86.71

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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.