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Finding the Fourth Proportional to 108.02, 162.02 and 53.87

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Solution

The fourth proportional to 108.02, 162.02 and 53.87 is: 80.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.02 : 162.02 = 53.87 : x
  2. Step 2: Convert to fraction form
    108.02/162.02 = 53.87/x
  3. Step 3: Cross multiply
    108.02x = 162.02 × 53.87
  4. Step 4: Simplify right side
    108.02x = 8,728.02
  5. Step 5: Solve for x
    x = 8,728.02/108.02
  6. Step 6: Final answer
    x = 80.80

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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.