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Finding the Fourth Proportional to 80,588.40, 120,853.80 and 27,999.60

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Solution

The fourth proportional to 80,588.40, 120,853.80 and 27,999.60 is: 41,989.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,588.40 : 120,853.80 = 27,999.60 : x
  2. Step 2: Convert to fraction form
    80,588.40/120,853.80 = 27,999.60/x
  3. Step 3: Cross multiply
    80,588.40x = 120,853.80 × 27,999.60
  4. Step 4: Simplify right side
    80,588.40x = 3,383,858,058.48
  5. Step 5: Solve for x
    x = 3,383,858,058.48/80,588.40
  6. Step 6: Final answer
    x = 41,989.39

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1.5x scale

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.