Home / 74,121.27-102,287.42-40,129.78

Finding the Fourth Proportional to 74,121.27, 102,287.42 and 40,129.78

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Solution

The fourth proportional to 74,121.27, 102,287.42 and 40,129.78 is: 55,379.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,121.27 : 102,287.42 = 40,129.78 : x
  2. Step 2: Convert to fraction form
    74,121.27/102,287.42 = 40,129.78/x
  3. Step 3: Cross multiply
    74,121.27x = 102,287.42 × 40,129.78
  4. Step 4: Simplify right side
    74,121.27x = 4,104,771,661.37
  5. Step 5: Solve for x
    x = 4,104,771,661.37/74,121.27
  6. Step 6: Final answer
    x = 55,379.13

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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.