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Finding the Fourth Proportional to 80,754.86, 111,485.40 and 56,629.86

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Solution

The fourth proportional to 80,754.86, 111,485.40 and 56,629.86 is: 78,179.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,754.86 : 111,485.40 = 56,629.86 : x
  2. Step 2: Convert to fraction form
    80,754.86/111,485.40 = 56,629.86/x
  3. Step 3: Cross multiply
    80,754.86x = 111,485.40 × 56,629.86
  4. Step 4: Simplify right side
    80,754.86x = 6,313,402,516.07
  5. Step 5: Solve for x
    x = 6,313,402,516.07/80,754.86
  6. Step 6: Final answer
    x = 78,179.84

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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.