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Finding the Fourth Proportional to 149.85, 225.05 and 89.10

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Solution

The fourth proportional to 149.85, 225.05 and 89.10 is: 133.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.85 : 225.05 = 89.10 : x
  2. Step 2: Convert to fraction form
    149.85/225.05 = 89.10/x
  3. Step 3: Cross multiply
    149.85x = 225.05 × 89.10
  4. Step 4: Simplify right side
    149.85x = 20,051.51
  5. Step 5: Solve for x
    x = 20,051.51/149.85
  6. Step 6: Final answer
    x = 133.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.