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Finding the Fourth Proportional to 108.76, 162.68 and 106.60

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Solution

The fourth proportional to 108.76, 162.68 and 106.60 is: 159.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.76 : 162.68 = 106.60 : x
  2. Step 2: Convert to fraction form
    108.76/162.68 = 106.60/x
  3. Step 3: Cross multiply
    108.76x = 162.68 × 106.60
  4. Step 4: Simplify right side
    108.76x = 17,341.69
  5. Step 5: Solve for x
    x = 17,341.69/108.76
  6. Step 6: Final answer
    x = 159.45

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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.