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Finding the Fourth Proportional to 72,614.10, 100,206.15 and 40,348.86

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Solution

The fourth proportional to 72,614.10, 100,206.15 and 40,348.86 is: 55,680.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,614.10 : 100,206.15 = 40,348.86 : x
  2. Step 2: Convert to fraction form
    72,614.10/100,206.15 = 40,348.86/x
  3. Step 3: Cross multiply
    72,614.10x = 100,206.15 × 40,348.86
  4. Step 4: Simplify right side
    72,614.10x = 4,043,203,917.49
  5. Step 5: Solve for x
    x = 4,043,203,917.49/72,614.10
  6. Step 6: Final answer
    x = 55,680.70

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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.