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Finding the Fourth Proportional to 75,571.72, 104,245.66 and 47,228.20

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Solution

The fourth proportional to 75,571.72, 104,245.66 and 47,228.20 is: 65,147.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,571.72 : 104,245.66 = 47,228.20 : x
  2. Step 2: Convert to fraction form
    75,571.72/104,245.66 = 47,228.20/x
  3. Step 3: Cross multiply
    75,571.72x = 104,245.66 × 47,228.20
  4. Step 4: Simplify right side
    75,571.72x = 4,923,335,051.96
  5. Step 5: Solve for x
    x = 4,923,335,051.96/75,571.72
  6. Step 6: Final answer
    x = 65,147.85

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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.