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Finding the Fourth Proportional to 225,967.20, 311,824.28 and 123,990.12

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Solution

The fourth proportional to 225,967.20, 311,824.28 and 123,990.12 is: 171,100.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,967.20 : 311,824.28 = 123,990.12 : x
  2. Step 2: Convert to fraction form
    225,967.20/311,824.28 = 123,990.12/x
  3. Step 3: Cross multiply
    225,967.20x = 311,824.28 × 123,990.12
  4. Step 4: Simplify right side
    225,967.20x = 38,663,129,896.11
  5. Step 5: Solve for x
    x = 38,663,129,896.11/225,967.20
  6. Step 6: Final answer
    x = 171,100.63

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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.