Home / 74,379.31-102,640.64-40,387.05

Finding the Fourth Proportional to 74,379.31, 102,640.64 and 40,387.05

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Solution

The fourth proportional to 74,379.31, 102,640.64 and 40,387.05 is: 55,732.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,379.31 : 102,640.64 = 40,387.05 : x
  2. Step 2: Convert to fraction form
    74,379.31/102,640.64 = 40,387.05/x
  3. Step 3: Cross multiply
    74,379.31x = 102,640.64 × 40,387.05
  4. Step 4: Simplify right side
    74,379.31x = 4,145,352,659.71
  5. Step 5: Solve for x
    x = 4,145,352,659.71/74,379.31
  6. Step 6: Final answer
    x = 55,732.60

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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.