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Finding the Fourth Proportional to 147.62, 203.51 and 103.88

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Solution

The fourth proportional to 147.62, 203.51 and 103.88 is: 143.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.62 : 203.51 = 103.88 : x
  2. Step 2: Convert to fraction form
    147.62/203.51 = 103.88/x
  3. Step 3: Cross multiply
    147.62x = 203.51 × 103.88
  4. Step 4: Simplify right side
    147.62x = 21,141.39
  5. Step 5: Solve for x
    x = 21,141.39/147.62
  6. Step 6: Final answer
    x = 143.21

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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.