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Finding the Fourth Proportional to 98.44, 135.50 and 88.57

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Solution

The fourth proportional to 98.44, 135.50 and 88.57 is: 121.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.44 : 135.50 = 88.57 : x
  2. Step 2: Convert to fraction form
    98.44/135.50 = 88.57/x
  3. Step 3: Cross multiply
    98.44x = 135.50 × 88.57
  4. Step 4: Simplify right side
    98.44x = 12,000.83
  5. Step 5: Solve for x
    x = 12,000.83/98.44
  6. Step 6: Final answer
    x = 121.91

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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.