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Finding the Fourth Proportional to 88.39, 122.07 and 67.74

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Solution

The fourth proportional to 88.39, 122.07 and 67.74 is: 93.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.39 : 122.07 = 67.74 : x
  2. Step 2: Convert to fraction form
    88.39/122.07 = 67.74/x
  3. Step 3: Cross multiply
    88.39x = 122.07 × 67.74
  4. Step 4: Simplify right side
    88.39x = 8,269.02
  5. Step 5: Solve for x
    x = 8,269.02/88.39
  6. Step 6: Final answer
    x = 93.55

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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.