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Finding the Fourth Proportional to 53,221.20, 79,831.80 and 47,230.80

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Solution

The fourth proportional to 53,221.20, 79,831.80 and 47,230.80 is: 70,846.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,221.20 : 79,831.80 = 47,230.80 : x
  2. Step 2: Convert to fraction form
    53,221.20/79,831.80 = 47,230.80/x
  3. Step 3: Cross multiply
    53,221.20x = 79,831.80 × 47,230.80
  4. Step 4: Simplify right side
    53,221.20x = 3,770,519,779.44
  5. Step 5: Solve for x
    x = 3,770,519,779.44/53,221.20
  6. Step 6: Final answer
    x = 70,846.20

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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.