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Finding the Fourth Proportional to 84,270.52, 126,405.78 and 21,941.08

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Solution

The fourth proportional to 84,270.52, 126,405.78 and 21,941.08 is: 32,911.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,270.52 : 126,405.78 = 21,941.08 : x
  2. Step 2: Convert to fraction form
    84,270.52/126,405.78 = 21,941.08/x
  3. Step 3: Cross multiply
    84,270.52x = 126,405.78 × 21,941.08
  4. Step 4: Simplify right side
    84,270.52x = 2,773,479,331.44
  5. Step 5: Solve for x
    x = 2,773,479,331.44/84,270.52
  6. Step 6: Final answer
    x = 32,911.62

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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.