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Finding the Fourth Proportional to 76,791.56, 115,538.70 and 45,650.12

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Solution

The fourth proportional to 76,791.56, 115,538.70 and 45,650.12 is: 68,684.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,791.56 : 115,538.70 = 45,650.12 : x
  2. Step 2: Convert to fraction form
    76,791.56/115,538.70 = 45,650.12/x
  3. Step 3: Cross multiply
    76,791.56x = 115,538.70 × 45,650.12
  4. Step 4: Simplify right side
    76,791.56x = 5,274,355,519.64
  5. Step 5: Solve for x
    x = 5,274,355,519.64/76,791.56
  6. Step 6: Final answer
    x = 68,684.05

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1.5x scale

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.