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Finding the Fourth Proportional to 225,661.52, 311,415.36 and 123,684.75

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Solution

The fourth proportional to 225,661.52, 311,415.36 and 123,684.75 is: 170,686.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,661.52 : 311,415.36 = 123,684.75 : x
  2. Step 2: Convert to fraction form
    225,661.52/311,415.36 = 123,684.75/x
  3. Step 3: Cross multiply
    225,661.52x = 311,415.36 × 123,684.75
  4. Step 4: Simplify right side
    225,661.52x = 38,517,330,947.76
  5. Step 5: Solve for x
    x = 38,517,330,947.76/225,661.52
  6. Step 6: Final answer
    x = 170,686.30

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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.