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Finding the Fourth Proportional to 88.91, 133.95 and 74.03

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Solution

The fourth proportional to 88.91, 133.95 and 74.03 is: 111.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.91 : 133.95 = 74.03 : x
  2. Step 2: Convert to fraction form
    88.91/133.95 = 74.03/x
  3. Step 3: Cross multiply
    88.91x = 133.95 × 74.03
  4. Step 4: Simplify right side
    88.91x = 9,915.65
  5. Step 5: Solve for x
    x = 9,915.65/88.91
  6. Step 6: Final answer
    x = 111.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.