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Finding the Fourth Proportional to 68,901.60, 103,352.40 and 47,906.40

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Solution

The fourth proportional to 68,901.60, 103,352.40 and 47,906.40 is: 71,859.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,901.60 : 103,352.40 = 47,906.40 : x
  2. Step 2: Convert to fraction form
    68,901.60/103,352.40 = 47,906.40/x
  3. Step 3: Cross multiply
    68,901.60x = 103,352.40 × 47,906.40
  4. Step 4: Simplify right side
    68,901.60x = 4,951,241,415.36
  5. Step 5: Solve for x
    x = 4,951,241,415.36/68,901.60
  6. Step 6: Final answer
    x = 71,859.60

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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.