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Finding the Fourth Proportional to 108,131.90, 162,003.45 and 66,530.30

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Solution

The fourth proportional to 108,131.90, 162,003.45 and 66,530.30 is: 99,675.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,131.90 : 162,003.45 = 66,530.30 : x
  2. Step 2: Convert to fraction form
    108,131.90/162,003.45 = 66,530.30/x
  3. Step 3: Cross multiply
    108,131.90x = 162,003.45 × 66,530.30
  4. Step 4: Simplify right side
    108,131.90x = 10,778,138,129.54
  5. Step 5: Solve for x
    x = 10,778,138,129.54/108,131.90
  6. Step 6: Final answer
    x = 99,675.84

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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.