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Finding the Fourth Proportional to 45,702.78, 68,489.88 and 21,661.56

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Solution

The fourth proportional to 45,702.78, 68,489.88 and 21,661.56 is: 32,461.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,702.78 : 68,489.88 = 21,661.56 : x
  2. Step 2: Convert to fraction form
    45,702.78/68,489.88 = 21,661.56/x
  3. Step 3: Cross multiply
    45,702.78x = 68,489.88 × 21,661.56
  4. Step 4: Simplify right side
    45,702.78x = 1,483,597,645.01
  5. Step 5: Solve for x
    x = 1,483,597,645.01/45,702.78
  6. Step 6: Final answer
    x = 32,461.87

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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.