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Finding the Fourth Proportional to 79,672.68, 109,986.12 and 50,615.82

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Solution

The fourth proportional to 79,672.68, 109,986.12 and 50,615.82 is: 69,873.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,672.68 : 109,986.12 = 50,615.82 : x
  2. Step 2: Convert to fraction form
    79,672.68/109,986.12 = 50,615.82/x
  3. Step 3: Cross multiply
    79,672.68x = 109,986.12 × 50,615.82
  4. Step 4: Simplify right side
    79,672.68x = 5,567,037,652.42
  5. Step 5: Solve for x
    x = 5,567,037,652.42/79,672.68
  6. Step 6: Final answer
    x = 69,873.86

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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.