Home / 74,121.28-102,287.43-40,129.79

Finding the Fourth Proportional to 74,121.28, 102,287.43 and 40,129.79

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Solution

The fourth proportional to 74,121.28, 102,287.43 and 40,129.79 is: 55,379.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,121.28 : 102,287.43 = 40,129.79 : x
  2. Step 2: Convert to fraction form
    74,121.28/102,287.43 = 40,129.79/x
  3. Step 3: Cross multiply
    74,121.28x = 102,287.43 × 40,129.79
  4. Step 4: Simplify right side
    74,121.28x = 4,104,772,373.45
  5. Step 5: Solve for x
    x = 4,104,772,373.45/74,121.28
  6. Step 6: Final answer
    x = 55,379.14

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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.