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Finding the Fourth Proportional to 109,190.40, 163,939.20 and 67,718.40

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Solution

The fourth proportional to 109,190.40, 163,939.20 and 67,718.40 is: 101,672.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,190.40 : 163,939.20 = 67,718.40 : x
  2. Step 2: Convert to fraction form
    109,190.40/163,939.20 = 67,718.40/x
  3. Step 3: Cross multiply
    109,190.40x = 163,939.20 × 67,718.40
  4. Step 4: Simplify right side
    109,190.40x = 11,101,700,321.28
  5. Step 5: Solve for x
    x = 11,101,700,321.28/109,190.40
  6. Step 6: Final answer
    x = 101,672.86

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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.