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Finding the Fourth Proportional to 108,168.20, 162,085.06 and 84,419.44

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Solution

The fourth proportional to 108,168.20, 162,085.06 and 84,419.44 is: 126,498.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,168.20 : 162,085.06 = 84,419.44 : x
  2. Step 2: Convert to fraction form
    108,168.20/162,085.06 = 84,419.44/x
  3. Step 3: Cross multiply
    108,168.20x = 162,085.06 × 84,419.44
  4. Step 4: Simplify right side
    108,168.20x = 13,683,129,997.57
  5. Step 5: Solve for x
    x = 13,683,129,997.57/108,168.20
  6. Step 6: Final answer
    x = 126,498.64

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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.