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Finding the Fourth Proportional to 99.54, 137.60 and 98.62

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Solution

The fourth proportional to 99.54, 137.60 and 98.62 is: 136.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.54 : 137.60 = 98.62 : x
  2. Step 2: Convert to fraction form
    99.54/137.60 = 98.62/x
  3. Step 3: Cross multiply
    99.54x = 137.60 × 98.62
  4. Step 4: Simplify right side
    99.54x = 13,570.11
  5. Step 5: Solve for x
    x = 13,570.11/99.54
  6. Step 6: Final answer
    x = 136.33

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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.