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Finding the Fourth Proportional to 168,090.40, 231,961.32 and 92,638.88

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Solution

The fourth proportional to 168,090.40, 231,961.32 and 92,638.88 is: 127,839.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,090.40 : 231,961.32 = 92,638.88 : x
  2. Step 2: Convert to fraction form
    168,090.40/231,961.32 = 92,638.88/x
  3. Step 3: Cross multiply
    168,090.40x = 231,961.32 × 92,638.88
  4. Step 4: Simplify right side
    168,090.40x = 21,488,636,888.12
  5. Step 5: Solve for x
    x = 21,488,636,888.12/168,090.40
  6. Step 6: Final answer
    x = 127,839.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.