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Finding the Fourth Proportional to 86,029.88, 118,734.17 and 61,910.69

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Solution

The fourth proportional to 86,029.88, 118,734.17 and 61,910.69 is: 85,446.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,029.88 : 118,734.17 = 61,910.69 : x
  2. Step 2: Convert to fraction form
    86,029.88/118,734.17 = 61,910.69/x
  3. Step 3: Cross multiply
    86,029.88x = 118,734.17 × 61,910.69
  4. Step 4: Simplify right side
    86,029.88x = 7,350,914,391.28
  5. Step 5: Solve for x
    x = 7,350,914,391.28/86,029.88
  6. Step 6: Final answer
    x = 85,446.06

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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.