Home / 99,815.20-149,722.80-90,629.80

Finding the Fourth Proportional to 99,815.20, 149,722.80 and 90,629.80

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Solution

The fourth proportional to 99,815.20, 149,722.80 and 90,629.80 is: 135,944.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,815.20 : 149,722.80 = 90,629.80 : x
  2. Step 2: Convert to fraction form
    99,815.20/149,722.80 = 90,629.80/x
  3. Step 3: Cross multiply
    99,815.20x = 149,722.80 × 90,629.80
  4. Step 4: Simplify right side
    99,815.20x = 13,569,347,419.44
  5. Step 5: Solve for x
    x = 13,569,347,419.44/99,815.20
  6. Step 6: Final answer
    x = 135,944.70

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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.