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Finding the Fourth Proportional to 62,986.12, 86,916.90 and 34,691.82

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Solution

The fourth proportional to 62,986.12, 86,916.90 and 34,691.82 is: 47,872.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,986.12 : 86,916.90 = 34,691.82 : x
  2. Step 2: Convert to fraction form
    62,986.12/86,916.90 = 34,691.82/x
  3. Step 3: Cross multiply
    62,986.12x = 86,916.90 × 34,691.82
  4. Step 4: Simplify right side
    62,986.12x = 3,015,305,449.76
  5. Step 5: Solve for x
    x = 3,015,305,449.76/62,986.12
  6. Step 6: Final answer
    x = 47,872.54

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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.