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Finding the Fourth Proportional to 65,375.78, 98,067.15 and 20,999.07

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Solution

The fourth proportional to 65,375.78, 98,067.15 and 20,999.07 is: 31,499.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,375.78 : 98,067.15 = 20,999.07 : x
  2. Step 2: Convert to fraction form
    65,375.78/98,067.15 = 20,999.07/x
  3. Step 3: Cross multiply
    65,375.78x = 98,067.15 × 20,999.07
  4. Step 4: Simplify right side
    65,375.78x = 2,059,318,947.55
  5. Step 5: Solve for x
    x = 2,059,318,947.55/65,375.78
  6. Step 6: Final answer
    x = 31,499.73

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1.5x scale

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.