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Finding the Fourth Proportional to 108.35, 162.47 and 53.49

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Solution

The fourth proportional to 108.35, 162.47 and 53.49 is: 80.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.35 : 162.47 = 53.49 : x
  2. Step 2: Convert to fraction form
    108.35/162.47 = 53.49/x
  3. Step 3: Cross multiply
    108.35x = 162.47 × 53.49
  4. Step 4: Simplify right side
    108.35x = 8,690.25
  5. Step 5: Solve for x
    x = 8,690.25/108.35
  6. Step 6: Final answer
    x = 80.20

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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.