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Finding the Fourth Proportional to 67, 92.16 and 64.02

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Solution

The fourth proportional to 67, 92.16 and 64.02 is: 88.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    67 : 92.16 = 64.02 : x
  2. Step 2: Convert to fraction form
    67/92.16 = 64.02/x
  3. Step 3: Cross multiply
    67x = 92.16 × 64.02
  4. Step 4: Simplify right side
    67x = 5,900.08
  5. Step 5: Solve for x
    x = 5,900.08/67
  6. Step 6: Final answer
    x = 88.06

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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.