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Finding the Fourth Proportional to 225,194.40, 310,725.11 and 128,396.43

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Solution

The fourth proportional to 225,194.40, 310,725.11 and 128,396.43 is: 177,162.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,194.40 : 310,725.11 = 128,396.43 : x
  2. Step 2: Convert to fraction form
    225,194.40/310,725.11 = 128,396.43/x
  3. Step 3: Cross multiply
    225,194.40x = 310,725.11 × 128,396.43
  4. Step 4: Simplify right side
    225,194.40x = 39,895,995,156.35
  5. Step 5: Solve for x
    x = 39,895,995,156.35/225,194.40
  6. Step 6: Final answer
    x = 177,162.47

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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.