Home / 90,651.57-135,930.66-40,688.83

Finding the Fourth Proportional to 90,651.57, 135,930.66 and 40,688.83

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Solution

The fourth proportional to 90,651.57, 135,930.66 and 40,688.83 is: 61,012.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,651.57 : 135,930.66 = 40,688.83 : x
  2. Step 2: Convert to fraction form
    90,651.57/135,930.66 = 40,688.83/x
  3. Step 3: Cross multiply
    90,651.57x = 135,930.66 × 40,688.83
  4. Step 4: Simplify right side
    90,651.57x = 5,530,859,516.53
  5. Step 5: Solve for x
    x = 5,530,859,516.53/90,651.57
  6. Step 6: Final answer
    x = 61,012.29

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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.