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Finding the Fourth Proportional to 104.96, 144.72 and 101.60

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Solution

The fourth proportional to 104.96, 144.72 and 101.60 is: 140.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.96 : 144.72 = 101.60 : x
  2. Step 2: Convert to fraction form
    104.96/144.72 = 101.60/x
  3. Step 3: Cross multiply
    104.96x = 144.72 × 101.60
  4. Step 4: Simplify right side
    104.96x = 14,703.55
  5. Step 5: Solve for x
    x = 14,703.55/104.96
  6. Step 6: Final answer
    x = 140.09

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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.