Home / 76,942.31-115,319.30-43,690.19

Finding the Fourth Proportional to 76,942.31, 115,319.30 and 43,690.19

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Solution

The fourth proportional to 76,942.31, 115,319.30 and 43,690.19 is: 65,481.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,942.31 : 115,319.30 = 43,690.19 : x
  2. Step 2: Convert to fraction form
    76,942.31/115,319.30 = 43,690.19/x
  3. Step 3: Cross multiply
    76,942.31x = 115,319.30 × 43,690.19
  4. Step 4: Simplify right side
    76,942.31x = 5,038,321,332.62
  5. Step 5: Solve for x
    x = 5,038,321,332.62/76,942.31
  6. Step 6: Final answer
    x = 65,481.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.