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Finding the Fourth Proportional to 225,667.68, 311,428.98 and 123,702.45

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Solution

The fourth proportional to 225,667.68, 311,428.98 and 123,702.45 is: 170,713.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,667.68 : 311,428.98 = 123,702.45 : x
  2. Step 2: Convert to fraction form
    225,667.68/311,428.98 = 123,702.45/x
  3. Step 3: Cross multiply
    225,667.68x = 311,428.98 × 123,702.45
  4. Step 4: Simplify right side
    225,667.68x = 38,524,527,827.00
  5. Step 5: Solve for x
    x = 38,524,527,827.00/225,667.68
  6. Step 6: Final answer
    x = 170,713.54

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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.