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Finding the Fourth Proportional to 76,731.70, 115,079.32 and 29,329.39

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Solution

The fourth proportional to 76,731.70, 115,079.32 and 29,329.39 is: 43,987.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,731.70 : 115,079.32 = 29,329.39 : x
  2. Step 2: Convert to fraction form
    76,731.70/115,079.32 = 29,329.39/x
  3. Step 3: Cross multiply
    76,731.70x = 115,079.32 × 29,329.39
  4. Step 4: Simplify right side
    76,731.70x = 3,375,206,257.21
  5. Step 5: Solve for x
    x = 3,375,206,257.21/76,731.70
  6. Step 6: Final answer
    x = 43,987.12

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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.