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Finding the Fourth Proportional to 109.65, 150.66 and 93.25

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Solution

The fourth proportional to 109.65, 150.66 and 93.25 is: 128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.65 : 150.66 = 93.25 : x
  2. Step 2: Convert to fraction form
    109.65/150.66 = 93.25/x
  3. Step 3: Cross multiply
    109.65x = 150.66 × 93.25
  4. Step 4: Simplify right side
    109.65x = 14,049.23
  5. Step 5: Solve for x
    x = 14,049.23/109.65
  6. Step 6: Final answer
    x = 128.12

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.