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Finding the Fourth Proportional to 67.62, 92.81 and 64.62

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Solution

The fourth proportional to 67.62, 92.81 and 64.62 is: 88.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.62 : 92.81 = 64.62 : x
  2. Step 2: Convert to fraction form
    67.62/92.81 = 64.62/x
  3. Step 3: Cross multiply
    67.62x = 92.81 × 64.62
  4. Step 4: Simplify right side
    67.62x = 5,997.06
  5. Step 5: Solve for x
    x = 5,997.06/67.62
  6. Step 6: Final answer
    x = 88.69

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These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.