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Finding the Fourth Proportional to 50,005.20, 75,007.80 and 20,407.80

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Solution

The fourth proportional to 50,005.20, 75,007.80 and 20,407.80 is: 30,611.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,005.20 : 75,007.80 = 20,407.80 : x
  2. Step 2: Convert to fraction form
    50,005.20/75,007.80 = 20,407.80/x
  3. Step 3: Cross multiply
    50,005.20x = 75,007.80 × 20,407.80
  4. Step 4: Simplify right side
    50,005.20x = 1,530,744,180.84
  5. Step 5: Solve for x
    x = 1,530,744,180.84/50,005.20
  6. Step 6: Final answer
    x = 30,611.70

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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.