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Finding the Fourth Proportional to 98.84, 136.41 and 55.18

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Solution

The fourth proportional to 98.84, 136.41 and 55.18 is: 76.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.84 : 136.41 = 55.18 : x
  2. Step 2: Convert to fraction form
    98.84/136.41 = 55.18/x
  3. Step 3: Cross multiply
    98.84x = 136.41 × 55.18
  4. Step 4: Simplify right side
    98.84x = 7,527.10
  5. Step 5: Solve for x
    x = 7,527.10/98.84
  6. Step 6: Final answer
    x = 76.15

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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.