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Finding the Fourth Proportional to 144.60, 215.99 and 103.70

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Solution

The fourth proportional to 144.60, 215.99 and 103.70 is: 154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.60 : 215.99 = 103.70 : x
  2. Step 2: Convert to fraction form
    144.60/215.99 = 103.70/x
  3. Step 3: Cross multiply
    144.60x = 215.99 × 103.70
  4. Step 4: Simplify right side
    144.60x = 22,398.16
  5. Step 5: Solve for x
    x = 22,398.16/144.60
  6. Step 6: Final answer
    x = 154.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.