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Finding the Fourth Proportional to 144.02, 198.75 and 88.75

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Solution

The fourth proportional to 144.02, 198.75 and 88.75 is: 122.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.02 : 198.75 = 88.75 : x
  2. Step 2: Convert to fraction form
    144.02/198.75 = 88.75/x
  3. Step 3: Cross multiply
    144.02x = 198.75 × 88.75
  4. Step 4: Simplify right side
    144.02x = 17,639.06
  5. Step 5: Solve for x
    x = 17,639.06/144.02
  6. Step 6: Final answer
    x = 122.48

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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.