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Finding the Fourth Proportional to 67,309.20, 100,963.80 and 66,434.40

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Solution

The fourth proportional to 67,309.20, 100,963.80 and 66,434.40 is: 99,651.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,309.20 : 100,963.80 = 66,434.40 : x
  2. Step 2: Convert to fraction form
    67,309.20/100,963.80 = 66,434.40/x
  3. Step 3: Cross multiply
    67,309.20x = 100,963.80 × 66,434.40
  4. Step 4: Simplify right side
    67,309.20x = 6,707,469,474.72
  5. Step 5: Solve for x
    x = 6,707,469,474.72/67,309.20
  6. Step 6: Final answer
    x = 99,651.60

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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.