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Finding the Fourth Proportional to 66.73, 92.50 and 64.17

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Solution

The fourth proportional to 66.73, 92.50 and 64.17 is: 88.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.73 : 92.50 = 64.17 : x
  2. Step 2: Convert to fraction form
    66.73/92.50 = 64.17/x
  3. Step 3: Cross multiply
    66.73x = 92.50 × 64.17
  4. Step 4: Simplify right side
    66.73x = 5,935.73
  5. Step 5: Solve for x
    x = 5,935.73/66.73
  6. Step 6: Final answer
    x = 88.95

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.