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Finding the Fourth Proportional to 113,998.20, 170,738.10 and 72,007.80

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Solution

The fourth proportional to 113,998.20, 170,738.10 and 72,007.80 is: 107,847.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,998.20 : 170,738.10 = 72,007.80 : x
  2. Step 2: Convert to fraction form
    113,998.20/170,738.10 = 72,007.80/x
  3. Step 3: Cross multiply
    113,998.20x = 170,738.10 × 72,007.80
  4. Step 4: Simplify right side
    113,998.20x = 12,294,474,957.18
  5. Step 5: Solve for x
    x = 12,294,474,957.18/113,998.20
  6. Step 6: Final answer
    x = 107,847.97

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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.