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Finding the Fourth Proportional to 225,616.65, 311,321.30 and 134,939.53

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Solution

The fourth proportional to 225,616.65, 311,321.30 and 134,939.53 is: 186,198.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,616.65 : 311,321.30 = 134,939.53 : x
  2. Step 2: Convert to fraction form
    225,616.65/311,321.30 = 134,939.53/x
  3. Step 3: Cross multiply
    225,616.65x = 311,321.30 × 134,939.53
  4. Step 4: Simplify right side
    225,616.65x = 42,009,549,900.99
  5. Step 5: Solve for x
    x = 42,009,549,900.99/225,616.65
  6. Step 6: Final answer
    x = 186,198.80

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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.