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Finding the Fourth Proportional to 108.40, 162.60 and 60.25

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Solution

The fourth proportional to 108.40, 162.60 and 60.25 is: 90.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.40 : 162.60 = 60.25 : x
  2. Step 2: Convert to fraction form
    108.40/162.60 = 60.25/x
  3. Step 3: Cross multiply
    108.40x = 162.60 × 60.25
  4. Step 4: Simplify right side
    108.40x = 9,796.65
  5. Step 5: Solve for x
    x = 9,796.65/108.40
  6. Step 6: Final answer
    x = 90.38

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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.