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Finding the Fourth Proportional to 201,921.60, 302,879.70 and 61,680.90

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Solution

The fourth proportional to 201,921.60, 302,879.70 and 61,680.90 is: 92,520.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,921.60 : 302,879.70 = 61,680.90 : x
  2. Step 2: Convert to fraction form
    201,921.60/302,879.70 = 61,680.90/x
  3. Step 3: Cross multiply
    201,921.60x = 302,879.70 × 61,680.90
  4. Step 4: Simplify right side
    201,921.60x = 18,681,892,487.73
  5. Step 5: Solve for x
    x = 18,681,892,487.73/201,921.60
  6. Step 6: Final answer
    x = 92,520.53

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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.