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Finding the Fourth Proportional to 63,000, 86,940 and 34,705.60

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Solution

The fourth proportional to 63,000, 86,940 and 34,705.60 is: 47,893.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,000 : 86,940 = 34,705.60 : x
  2. Step 2: Convert to fraction form
    63,000/86,940 = 34,705.60/x
  3. Step 3: Cross multiply
    63,000x = 86,940 × 34,705.60
  4. Step 4: Simplify right side
    63,000x = 3,017,304,864
  5. Step 5: Solve for x
    x = 3,017,304,864/63,000
  6. Step 6: Final answer
    x = 47,893.73

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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.