Home / 74,120.27-102,286.04-40,128.78

Finding the Fourth Proportional to 74,120.27, 102,286.04 and 40,128.78

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Solution

The fourth proportional to 74,120.27, 102,286.04 and 40,128.78 is: 55,377.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,120.27 : 102,286.04 = 40,128.78 : x
  2. Step 2: Convert to fraction form
    74,120.27/102,286.04 = 40,128.78/x
  3. Step 3: Cross multiply
    74,120.27x = 102,286.04 × 40,128.78
  4. Step 4: Simplify right side
    74,120.27x = 4,104,614,480.13
  5. Step 5: Solve for x
    x = 4,104,614,480.13/74,120.27
  6. Step 6: Final answer
    x = 55,377.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.