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Finding the Fourth Proportional to 84.78, 127.18 and 62.23

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Solution

The fourth proportional to 84.78, 127.18 and 62.23 is: 93.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.78 : 127.18 = 62.23 : x
  2. Step 2: Convert to fraction form
    84.78/127.18 = 62.23/x
  3. Step 3: Cross multiply
    84.78x = 127.18 × 62.23
  4. Step 4: Simplify right side
    84.78x = 7,914.41
  5. Step 5: Solve for x
    x = 7,914.41/84.78
  6. Step 6: Final answer
    x = 93.35

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.