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Finding the Fourth Proportional to 53,221.70, 79,832.55 and 47,231.30

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Solution

The fourth proportional to 53,221.70, 79,832.55 and 47,231.30 is: 70,846.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,221.70 : 79,832.55 = 47,231.30 : x
  2. Step 2: Convert to fraction form
    53,221.70/79,832.55 = 47,231.30/x
  3. Step 3: Cross multiply
    53,221.70x = 79,832.55 × 47,231.30
  4. Step 4: Simplify right side
    53,221.70x = 3,770,595,118.82
  5. Step 5: Solve for x
    x = 3,770,595,118.82/53,221.70
  6. Step 6: Final answer
    x = 70,846.95

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Similar ratio
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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.