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Finding the Fourth Proportional to 72,617.94, 100,217.79 and 40,786.83

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Solution

The fourth proportional to 72,617.94, 100,217.79 and 40,786.83 is: 56,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,617.94 : 100,217.79 = 40,786.83 : x
  2. Step 2: Convert to fraction form
    72,617.94/100,217.79 = 40,786.83/x
  3. Step 3: Cross multiply
    72,617.94x = 100,217.79 × 40,786.83
  4. Step 4: Simplify right side
    72,617.94x = 4,087,565,963.71
  5. Step 5: Solve for x
    x = 4,087,565,963.71/72,617.94
  6. Step 6: Final answer
    x = 56,288.65

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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.