Home / 74,121.15-102,287.25-40,129.67

Finding the Fourth Proportional to 74,121.15, 102,287.25 and 40,129.67

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Solution

The fourth proportional to 74,121.15, 102,287.25 and 40,129.67 is: 55,378.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,121.15 : 102,287.25 = 40,129.67 : x
  2. Step 2: Convert to fraction form
    74,121.15/102,287.25 = 40,129.67/x
  3. Step 3: Cross multiply
    74,121.15x = 102,287.25 × 40,129.67
  4. Step 4: Simplify right side
    74,121.15x = 4,104,753,076.27
  5. Step 5: Solve for x
    x = 4,104,753,076.27/74,121.15
  6. Step 6: Final answer
    x = 55,378.97

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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.