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Finding the Fourth Proportional to 101.80, 152.60 and 89.65

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Solution

The fourth proportional to 101.80, 152.60 and 89.65 is: 134.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.80 : 152.60 = 89.65 : x
  2. Step 2: Convert to fraction form
    101.80/152.60 = 89.65/x
  3. Step 3: Cross multiply
    101.80x = 152.60 × 89.65
  4. Step 4: Simplify right side
    101.80x = 13,680.59
  5. Step 5: Solve for x
    x = 13,680.59/101.80
  6. Step 6: Final answer
    x = 134.39

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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.