Home / 74,378.73-102,643.38-40,387.53

Finding the Fourth Proportional to 74,378.73, 102,643.38 and 40,387.53

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Solution

The fourth proportional to 74,378.73, 102,643.38 and 40,387.53 is: 55,735.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,378.73 : 102,643.38 = 40,387.53 : x
  2. Step 2: Convert to fraction form
    74,378.73/102,643.38 = 40,387.53/x
  3. Step 3: Cross multiply
    74,378.73x = 102,643.38 × 40,387.53
  4. Step 4: Simplify right side
    74,378.73x = 4,145,512,589.05
  5. Step 5: Solve for x
    x = 4,145,512,589.05/74,378.73
  6. Step 6: Final answer
    x = 55,735.19

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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.