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Finding the Fourth Proportional to 129,610.86, 193,977.18 and 79,722.60

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Solution

The fourth proportional to 129,610.86, 193,977.18 and 79,722.60 is: 119,313.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,610.86 : 193,977.18 = 79,722.60 : x
  2. Step 2: Convert to fraction form
    129,610.86/193,977.18 = 79,722.60/x
  3. Step 3: Cross multiply
    129,610.86x = 193,977.18 × 79,722.60
  4. Step 4: Simplify right side
    129,610.86x = 15,464,365,130.27
  5. Step 5: Solve for x
    x = 15,464,365,130.27/129,610.86
  6. Step 6: Final answer
    x = 119,313.81

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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.