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Finding the Fourth Proportional to 71,228.63, 106,879.39 and 29,139.82

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Solution

The fourth proportional to 71,228.63, 106,879.39 and 29,139.82 is: 43,724.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,228.63 : 106,879.39 = 29,139.82 : x
  2. Step 2: Convert to fraction form
    71,228.63/106,879.39 = 29,139.82/x
  3. Step 3: Cross multiply
    71,228.63x = 106,879.39 × 29,139.82
  4. Step 4: Simplify right side
    71,228.63x = 3,114,446,186.31
  5. Step 5: Solve for x
    x = 3,114,446,186.31/71,228.63
  6. Step 6: Final answer
    x = 43,724.64

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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.