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Finding the Fourth Proportional to 88.33, 121.82 and 70.74

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Solution

The fourth proportional to 88.33, 121.82 and 70.74 is: 97.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.33 : 121.82 = 70.74 : x
  2. Step 2: Convert to fraction form
    88.33/121.82 = 70.74/x
  3. Step 3: Cross multiply
    88.33x = 121.82 × 70.74
  4. Step 4: Simplify right side
    88.33x = 8,617.23
  5. Step 5: Solve for x
    x = 8,617.23/88.33
  6. Step 6: Final answer
    x = 97.55

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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.