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Finding the Fourth Proportional to 99.84, 137.86 and 67.16

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Solution

The fourth proportional to 99.84, 137.86 and 67.16 is: 92.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.84 : 137.86 = 67.16 : x
  2. Step 2: Convert to fraction form
    99.84/137.86 = 67.16/x
  3. Step 3: Cross multiply
    99.84x = 137.86 × 67.16
  4. Step 4: Simplify right side
    99.84x = 9,258.68
  5. Step 5: Solve for x
    x = 9,258.68/99.84
  6. Step 6: Final answer
    x = 92.74

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.