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Finding the Fourth Proportional to 104.65, 144.45 and 101.23

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Solution

The fourth proportional to 104.65, 144.45 and 101.23 is: 139.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.65 : 144.45 = 101.23 : x
  2. Step 2: Convert to fraction form
    104.65/144.45 = 101.23/x
  3. Step 3: Cross multiply
    104.65x = 144.45 × 101.23
  4. Step 4: Simplify right side
    104.65x = 14,621.45
  5. Step 5: Solve for x
    x = 14,621.45/104.65
  6. Step 6: Final answer
    x = 139.72

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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.