Home / 99,811.20-149,789.70-70,286.70

Finding the Fourth Proportional to 99,811.20, 149,789.70 and 70,286.70

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Solution

The fourth proportional to 99,811.20, 149,789.70 and 70,286.70 is: 105,481.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,811.20 : 149,789.70 = 70,286.70 : x
  2. Step 2: Convert to fraction form
    99,811.20/149,789.70 = 70,286.70/x
  3. Step 3: Cross multiply
    99,811.20x = 149,789.70 × 70,286.70
  4. Step 4: Simplify right side
    99,811.20x = 10,528,223,706.99
  5. Step 5: Solve for x
    x = 10,528,223,706.99/99,811.20
  6. Step 6: Final answer
    x = 105,481.39

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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.