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Finding the Fourth Proportional to 104.88, 144.69 and 65.54

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Solution

The fourth proportional to 104.88, 144.69 and 65.54 is: 90.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.88 : 144.69 = 65.54 : x
  2. Step 2: Convert to fraction form
    104.88/144.69 = 65.54/x
  3. Step 3: Cross multiply
    104.88x = 144.69 × 65.54
  4. Step 4: Simplify right side
    104.88x = 9,482.26
  5. Step 5: Solve for x
    x = 9,482.26/104.88
  6. Step 6: Final answer
    x = 90.41

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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.