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Finding the Fourth Proportional to 84.69, 127.53 and 74.67

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Solution

The fourth proportional to 84.69, 127.53 and 74.67 is: 112.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.69 : 127.53 = 74.67 : x
  2. Step 2: Convert to fraction form
    84.69/127.53 = 74.67/x
  3. Step 3: Cross multiply
    84.69x = 127.53 × 74.67
  4. Step 4: Simplify right side
    84.69x = 9,522.67
  5. Step 5: Solve for x
    x = 9,522.67/84.69
  6. Step 6: Final answer
    x = 112.44

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