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Finding the Fourth Proportional to 128,234.40, 192,679.65 and 113,800.20

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Solution

The fourth proportional to 128,234.40, 192,679.65 and 113,800.20 is: 170,991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,234.40 : 192,679.65 = 113,800.20 : x
  2. Step 2: Convert to fraction form
    128,234.40/192,679.65 = 113,800.20/x
  3. Step 3: Cross multiply
    128,234.40x = 192,679.65 × 113,800.20
  4. Step 4: Simplify right side
    128,234.40x = 21,926,982,705.93
  5. Step 5: Solve for x
    x = 21,926,982,705.93/128,234.40
  6. Step 6: Final answer
    x = 170,991.42

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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.