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Finding the Fourth Proportional to 207,399.15, 311,219.46 and 87,448.58

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Solution

The fourth proportional to 207,399.15, 311,219.46 and 87,448.58 is: 131,223.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,399.15 : 311,219.46 = 87,448.58 : x
  2. Step 2: Convert to fraction form
    207,399.15/311,219.46 = 87,448.58/x
  3. Step 3: Cross multiply
    207,399.15x = 311,219.46 × 87,448.58
  4. Step 4: Simplify right side
    207,399.15x = 27,215,699,845.37
  5. Step 5: Solve for x
    x = 27,215,699,845.37/207,399.15
  6. Step 6: Final answer
    x = 131,223.78

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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.