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Finding the Fourth Proportional to 108,057.12, 162,134.16 and 68,603.68

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Solution

The fourth proportional to 108,057.12, 162,134.16 and 68,603.68 is: 102,936.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,057.12 : 162,134.16 = 68,603.68 : x
  2. Step 2: Convert to fraction form
    108,057.12/162,134.16 = 68,603.68/x
  3. Step 3: Cross multiply
    108,057.12x = 162,134.16 × 68,603.68
  4. Step 4: Simplify right side
    108,057.12x = 11,123,000,029.71
  5. Step 5: Solve for x
    x = 11,123,000,029.71/108,057.12
  6. Step 6: Final answer
    x = 102,936.30

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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.