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Finding the Fourth Proportional to 80,644.41, 120,966.48 and 21,480.26

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Solution

The fourth proportional to 80,644.41, 120,966.48 and 21,480.26 is: 32,220.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,644.41 : 120,966.48 = 21,480.26 : x
  2. Step 2: Convert to fraction form
    80,644.41/120,966.48 = 21,480.26/x
  3. Step 3: Cross multiply
    80,644.41x = 120,966.48 × 21,480.26
  4. Step 4: Simplify right side
    80,644.41x = 2,598,390,836.85
  5. Step 5: Solve for x
    x = 2,598,390,836.85/80,644.41
  6. Step 6: Final answer
    x = 32,220.35

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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.