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Finding the Fourth Proportional to 205,961.60, 308,942.40 and 65,734.40

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Solution

The fourth proportional to 205,961.60, 308,942.40 and 65,734.40 is: 98,601.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,961.60 : 308,942.40 = 65,734.40 : x
  2. Step 2: Convert to fraction form
    205,961.60/308,942.40 = 65,734.40/x
  3. Step 3: Cross multiply
    205,961.60x = 308,942.40 × 65,734.40
  4. Step 4: Simplify right side
    205,961.60x = 20,308,143,298.56
  5. Step 5: Solve for x
    x = 20,308,143,298.56/205,961.60
  6. Step 6: Final answer
    x = 98,601.60

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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.