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Finding the Fourth Proportional to 131,422.80, 197,134.20 and 100,318.80

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Solution

The fourth proportional to 131,422.80, 197,134.20 and 100,318.80 is: 150,478.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,422.80 : 197,134.20 = 100,318.80 : x
  2. Step 2: Convert to fraction form
    131,422.80/197,134.20 = 100,318.80/x
  3. Step 3: Cross multiply
    131,422.80x = 197,134.20 × 100,318.80
  4. Step 4: Simplify right side
    131,422.80x = 19,776,266,382.96
  5. Step 5: Solve for x
    x = 19,776,266,382.96/131,422.80
  6. Step 6: Final answer
    x = 150,478.20

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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.