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Finding the Fourth Proportional to 96.61, 133.14 and 67.45

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Solution

The fourth proportional to 96.61, 133.14 and 67.45 is: 92.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.61 : 133.14 = 67.45 : x
  2. Step 2: Convert to fraction form
    96.61/133.14 = 67.45/x
  3. Step 3: Cross multiply
    96.61x = 133.14 × 67.45
  4. Step 4: Simplify right side
    96.61x = 8,980.29
  5. Step 5: Solve for x
    x = 8,980.29/96.61
  6. Step 6: Final answer
    x = 92.95

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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.