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Finding the Fourth Proportional to 143.63, 216.28 and 103.33

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Solution

The fourth proportional to 143.63, 216.28 and 103.33 is: 155.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.63 : 216.28 = 103.33 : x
  2. Step 2: Convert to fraction form
    143.63/216.28 = 103.33/x
  3. Step 3: Cross multiply
    143.63x = 216.28 × 103.33
  4. Step 4: Simplify right side
    143.63x = 22,348.21
  5. Step 5: Solve for x
    x = 22,348.21/143.63
  6. Step 6: Final answer
    x = 155.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.