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Finding the Fourth Proportional to 80,621.86, 111,212.76 and 48,347.88

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Solution

The fourth proportional to 80,621.86, 111,212.76 and 48,347.88 is: 66,692.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,621.86 : 111,212.76 = 48,347.88 : x
  2. Step 2: Convert to fraction form
    80,621.86/111,212.76 = 48,347.88/x
  3. Step 3: Cross multiply
    80,621.86x = 111,212.76 × 48,347.88
  4. Step 4: Simplify right side
    80,621.86x = 5,376,901,174.95
  5. Step 5: Solve for x
    x = 5,376,901,174.95/80,621.86
  6. Step 6: Final answer
    x = 66,692.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.