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Finding the Fourth Proportional to 101,520.50, 140,161.84 and 65,236.64

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Solution

The fourth proportional to 101,520.50, 140,161.84 and 65,236.64 is: 90,067.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,520.50 : 140,161.84 = 65,236.64 : x
  2. Step 2: Convert to fraction form
    101,520.50/140,161.84 = 65,236.64/x
  3. Step 3: Cross multiply
    101,520.50x = 140,161.84 × 65,236.64
  4. Step 4: Simplify right side
    101,520.50x = 9,143,687,497.82
  5. Step 5: Solve for x
    x = 9,143,687,497.82/101,520.50
  6. Step 6: Final answer
    x = 90,067.40

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1.5x scale

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.