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Finding the Fourth Proportional to 101.44, 151.55 and 85.04

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Solution

The fourth proportional to 101.44, 151.55 and 85.04 is: 127.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.44 : 151.55 = 85.04 : x
  2. Step 2: Convert to fraction form
    101.44/151.55 = 85.04/x
  3. Step 3: Cross multiply
    101.44x = 151.55 × 85.04
  4. Step 4: Simplify right side
    101.44x = 12,887.81
  5. Step 5: Solve for x
    x = 12,887.81/101.44
  6. Step 6: Final answer
    x = 127.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.