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Finding the Fourth Proportional to 148.85, 205.44 and 89.87

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Solution

The fourth proportional to 148.85, 205.44 and 89.87 is: 124.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.85 : 205.44 = 89.87 : x
  2. Step 2: Convert to fraction form
    148.85/205.44 = 89.87/x
  3. Step 3: Cross multiply
    148.85x = 205.44 × 89.87
  4. Step 4: Simplify right side
    148.85x = 18,461.87
  5. Step 5: Solve for x
    x = 18,461.87/148.85
  6. Step 6: Final answer
    x = 124.03

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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.