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Finding the Fourth Proportional to 45,672.73, 68,411.76 and 21,945.40

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Solution

The fourth proportional to 45,672.73, 68,411.76 and 21,945.40 is: 32,871.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,672.73 : 68,411.76 = 21,945.40 : x
  2. Step 2: Convert to fraction form
    45,672.73/68,411.76 = 21,945.40/x
  3. Step 3: Cross multiply
    45,672.73x = 68,411.76 × 21,945.40
  4. Step 4: Simplify right side
    45,672.73x = 1,501,323,437.90
  5. Step 5: Solve for x
    x = 1,501,323,437.90/45,672.73
  6. Step 6: Final answer
    x = 32,871.33

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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.