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Finding the Fourth Proportional to 73,217.40, 109,826.10 and 72,439.80

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Solution

The fourth proportional to 73,217.40, 109,826.10 and 72,439.80 is: 108,659.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,217.40 : 109,826.10 = 72,439.80 : x
  2. Step 2: Convert to fraction form
    73,217.40/109,826.10 = 72,439.80/x
  3. Step 3: Cross multiply
    73,217.40x = 109,826.10 × 72,439.80
  4. Step 4: Simplify right side
    73,217.40x = 7,955,780,718.78
  5. Step 5: Solve for x
    x = 7,955,780,718.78/73,217.40
  6. Step 6: Final answer
    x = 108,659.70

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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.