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Finding the Fourth Proportional to 225,549.65, 311,218.95 and 128,709.29

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Solution

The fourth proportional to 225,549.65, 311,218.95 and 128,709.29 is: 177,596.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,549.65 : 311,218.95 = 128,709.29 : x
  2. Step 2: Convert to fraction form
    225,549.65/311,218.95 = 128,709.29/x
  3. Step 3: Cross multiply
    225,549.65x = 311,218.95 × 128,709.29
  4. Step 4: Simplify right side
    225,549.65x = 40,056,770,089.05
  5. Step 5: Solve for x
    x = 40,056,770,089.05/225,549.65
  6. Step 6: Final answer
    x = 177,596.24

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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.