Home / 189,861.36-261,989.16-109,273.20

Finding the Fourth Proportional to 189,861.36, 261,989.16 and 109,273.20

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Solution

The fourth proportional to 189,861.36, 261,989.16 and 109,273.20 is: 150,785.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,861.36 : 261,989.16 = 109,273.20 : x
  2. Step 2: Convert to fraction form
    189,861.36/261,989.16 = 109,273.20/x
  3. Step 3: Cross multiply
    189,861.36x = 261,989.16 × 109,273.20
  4. Step 4: Simplify right side
    189,861.36x = 28,628,393,878.51
  5. Step 5: Solve for x
    x = 28,628,393,878.51/189,861.36
  6. Step 6: Final answer
    x = 150,785.78

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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.