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Finding the Fourth Proportional to 144.68, 199.66 and 85.68

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Solution

The fourth proportional to 144.68, 199.66 and 85.68 is: 118.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.68 : 199.66 = 85.68 : x
  2. Step 2: Convert to fraction form
    144.68/199.66 = 85.68/x
  3. Step 3: Cross multiply
    144.68x = 199.66 × 85.68
  4. Step 4: Simplify right side
    144.68x = 17,106.87
  5. Step 5: Solve for x
    x = 17,106.87/144.68
  6. Step 6: Final answer
    x = 118.24

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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.