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Finding the Fourth Proportional to 276,149.21, 414,228.96 and 86,605.38

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Solution

The fourth proportional to 276,149.21, 414,228.96 and 86,605.38 is: 129,909.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,149.21 : 414,228.96 = 86,605.38 : x
  2. Step 2: Convert to fraction form
    276,149.21/414,228.96 = 86,605.38/x
  3. Step 3: Cross multiply
    276,149.21x = 414,228.96 × 86,605.38
  4. Step 4: Simplify right side
    276,149.21x = 35,874,456,487.80
  5. Step 5: Solve for x
    x = 35,874,456,487.80/276,149.21
  6. Step 6: Final answer
    x = 129,909.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.