Home / 74,121.42-102,287.58-40,129.90

Finding the Fourth Proportional to 74,121.42, 102,287.58 and 40,129.90

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Solution

The fourth proportional to 74,121.42, 102,287.58 and 40,129.90 is: 55,379.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,121.42 : 102,287.58 = 40,129.90 : x
  2. Step 2: Convert to fraction form
    74,121.42/102,287.58 = 40,129.90/x
  3. Step 3: Cross multiply
    74,121.42x = 102,287.58 × 40,129.90
  4. Step 4: Simplify right side
    74,121.42x = 4,104,790,356.64
  5. Step 5: Solve for x
    x = 4,104,790,356.64/74,121.42
  6. Step 6: Final answer
    x = 55,379.27

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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.