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Finding the Fourth Proportional to 225,401.87, 311,040.76 and 123,428.54

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Solution

The fourth proportional to 225,401.87, 311,040.76 and 123,428.54 is: 170,323.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,401.87 : 311,040.76 = 123,428.54 : x
  2. Step 2: Convert to fraction form
    225,401.87/311,040.76 = 123,428.54/x
  3. Step 3: Cross multiply
    225,401.87x = 311,040.76 × 123,428.54
  4. Step 4: Simplify right side
    225,401.87x = 38,391,306,887.29
  5. Step 5: Solve for x
    x = 38,391,306,887.29/225,401.87
  6. Step 6: Final answer
    x = 170,323.82

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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.