Home / 76,640.12-115,025.79-43,392.86

Finding the Fourth Proportional to 76,640.12, 115,025.79 and 43,392.86

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Solution

The fourth proportional to 76,640.12, 115,025.79 and 43,392.86 is: 65,126.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,640.12 : 115,025.79 = 43,392.86 : x
  2. Step 2: Convert to fraction form
    76,640.12/115,025.79 = 43,392.86/x
  3. Step 3: Cross multiply
    76,640.12x = 115,025.79 × 43,392.86
  4. Step 4: Simplify right side
    76,640.12x = 4,991,298,001.86
  5. Step 5: Solve for x
    x = 4,991,298,001.86/76,640.12
  6. Step 6: Final answer
    x = 65,126.44

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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.