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Finding the Fourth Proportional to 80,530.48, 120,780.60 and 27,929.20

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Solution

The fourth proportional to 80,530.48, 120,780.60 and 27,929.20 is: 41,888.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,530.48 : 120,780.60 = 27,929.20 : x
  2. Step 2: Convert to fraction form
    80,530.48/120,780.60 = 27,929.20/x
  3. Step 3: Cross multiply
    80,530.48x = 120,780.60 × 27,929.20
  4. Step 4: Simplify right side
    80,530.48x = 3,373,305,533.52
  5. Step 5: Solve for x
    x = 3,373,305,533.52/80,530.48
  6. Step 6: Final answer
    x = 41,888.56

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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.