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Finding the Fourth Proportional to 108.72, 162.83 and 63

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Solution

The fourth proportional to 108.72, 162.83 and 63 is: 94.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.72 : 162.83 = 63 : x
  2. Step 2: Convert to fraction form
    108.72/162.83 = 63/x
  3. Step 3: Cross multiply
    108.72x = 162.83 × 63
  4. Step 4: Simplify right side
    108.72x = 10,257.98
  5. Step 5: Solve for x
    x = 10,257.98/108.72
  6. Step 6: Final answer
    x = 94.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.