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Finding the Fourth Proportional to 108,005.40, 162,008.10 and 68,736.60

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Solution

The fourth proportional to 108,005.40, 162,008.10 and 68,736.60 is: 103,104.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,005.40 : 162,008.10 = 68,736.60 : x
  2. Step 2: Convert to fraction form
    108,005.40/162,008.10 = 68,736.60/x
  3. Step 3: Cross multiply
    108,005.40x = 162,008.10 × 68,736.60
  4. Step 4: Simplify right side
    108,005.40x = 11,135,885,966.46
  5. Step 5: Solve for x
    x = 11,135,885,966.46/108,005.40
  6. Step 6: Final answer
    x = 103,104.90

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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.