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Finding the Fourth Proportional to 98.27, 147.94 and 89.90

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Solution

The fourth proportional to 98.27, 147.94 and 89.90 is: 135.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.27 : 147.94 = 89.90 : x
  2. Step 2: Convert to fraction form
    98.27/147.94 = 89.90/x
  3. Step 3: Cross multiply
    98.27x = 147.94 × 89.90
  4. Step 4: Simplify right side
    98.27x = 13,299.81
  5. Step 5: Solve for x
    x = 13,299.81/98.27
  6. Step 6: Final answer
    x = 135.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.