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Finding the Fourth Proportional to 108,705.34, 162,872.11 and 85,003.73

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Solution

The fourth proportional to 108,705.34, 162,872.11 and 85,003.73 is: 127,360.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,705.34 : 162,872.11 = 85,003.73 : x
  2. Step 2: Convert to fraction form
    108,705.34/162,872.11 = 85,003.73/x
  3. Step 3: Cross multiply
    108,705.34x = 162,872.11 × 85,003.73
  4. Step 4: Simplify right side
    108,705.34x = 13,844,735,623.59
  5. Step 5: Solve for x
    x = 13,844,735,623.59/108,705.34
  6. Step 6: Final answer
    x = 127,360.22

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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.