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Finding the Fourth Proportional to 144.51, 199.42 and 79.01

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Solution

The fourth proportional to 144.51, 199.42 and 79.01 is: 109.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.51 : 199.42 = 79.01 : x
  2. Step 2: Convert to fraction form
    144.51/199.42 = 79.01/x
  3. Step 3: Cross multiply
    144.51x = 199.42 × 79.01
  4. Step 4: Simplify right side
    144.51x = 15,756.17
  5. Step 5: Solve for x
    x = 15,756.17/144.51
  6. Step 6: Final answer
    x = 109.03

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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.