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Finding the Fourth Proportional to 62,982, 86,915.28 and 34,690.32

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Solution

The fourth proportional to 62,982, 86,915.28 and 34,690.32 is: 47,872.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,982 : 86,915.28 = 34,690.32 : x
  2. Step 2: Convert to fraction form
    62,982/86,915.28 = 34,690.32/x
  3. Step 3: Cross multiply
    62,982x = 86,915.28 × 34,690.32
  4. Step 4: Simplify right side
    62,982x = 3,015,118,876.09
  5. Step 5: Solve for x
    x = 3,015,118,876.09/62,982
  6. Step 6: Final answer
    x = 47,872.71

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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.