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Finding the Fourth Proportional to 79,516.70, 109,731.20 and 43,217.29

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Solution

The fourth proportional to 79,516.70, 109,731.20 and 43,217.29 is: 59,638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,516.70 : 109,731.20 = 43,217.29 : x
  2. Step 2: Convert to fraction form
    79,516.70/109,731.20 = 43,217.29/x
  3. Step 3: Cross multiply
    79,516.70x = 109,731.20 × 43,217.29
  4. Step 4: Simplify right side
    79,516.70x = 4,742,285,092.45
  5. Step 5: Solve for x
    x = 4,742,285,092.45/79,516.70
  6. Step 6: Final answer
    x = 59,638.86

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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.