Home / 100,861.39-139,183.20-55,530.76

Finding the Fourth Proportional to 100,861.39, 139,183.20 and 55,530.76

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Solution

The fourth proportional to 100,861.39, 139,183.20 and 55,530.76 is: 76,629.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,861.39 : 139,183.20 = 55,530.76 : x
  2. Step 2: Convert to fraction form
    100,861.39/139,183.20 = 55,530.76/x
  3. Step 3: Cross multiply
    100,861.39x = 139,183.20 × 55,530.76
  4. Step 4: Simplify right side
    100,861.39x = 7,728,949,362.02
  5. Step 5: Solve for x
    x = 7,728,949,362.02/100,861.39
  6. Step 6: Final answer
    x = 76,629.42

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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.