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Finding the Fourth Proportional to 79,576.53, 109,778.79 and 47,690.07

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Solution

The fourth proportional to 79,576.53, 109,778.79 and 47,690.07 is: 65,790.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,576.53 : 109,778.79 = 47,690.07 : x
  2. Step 2: Convert to fraction form
    79,576.53/109,778.79 = 47,690.07/x
  3. Step 3: Cross multiply
    79,576.53x = 109,778.79 × 47,690.07
  4. Step 4: Simplify right side
    79,576.53x = 5,235,358,179.62
  5. Step 5: Solve for x
    x = 5,235,358,179.62/79,576.53
  6. Step 6: Final answer
    x = 65,790.23

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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.