Home / 72,778.10-100,433.06-40,512.20

Finding the Fourth Proportional to 72,778.10, 100,433.06 and 40,512.20

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Solution

The fourth proportional to 72,778.10, 100,433.06 and 40,512.20 is: 55,906.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,778.10 : 100,433.06 = 40,512.20 : x
  2. Step 2: Convert to fraction form
    72,778.10/100,433.06 = 40,512.20/x
  3. Step 3: Cross multiply
    72,778.10x = 100,433.06 × 40,512.20
  4. Step 4: Simplify right side
    72,778.10x = 4,068,764,213.33
  5. Step 5: Solve for x
    x = 4,068,764,213.33/72,778.10
  6. Step 6: Final answer
    x = 55,906.44

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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.