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Finding the Fourth Proportional to 84,001.50, 126,004.68 and 21,672

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Solution

The fourth proportional to 84,001.50, 126,004.68 and 21,672 is: 32,508.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,001.50 : 126,004.68 = 21,672 : x
  2. Step 2: Convert to fraction form
    84,001.50/126,004.68 = 21,672/x
  3. Step 3: Cross multiply
    84,001.50x = 126,004.68 × 21,672
  4. Step 4: Simplify right side
    84,001.50x = 2,730,773,424.96
  5. Step 5: Solve for x
    x = 2,730,773,424.96/84,001.50
  6. Step 6: Final answer
    x = 32,508.63

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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.