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Finding the Fourth Proportional to 72,730.39, 100,367.31 and 40,898.61

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Solution

The fourth proportional to 72,730.39, 100,367.31 and 40,898.61 is: 56,439.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,730.39 : 100,367.31 = 40,898.61 : x
  2. Step 2: Convert to fraction form
    72,730.39/100,367.31 = 40,898.61/x
  3. Step 3: Cross multiply
    72,730.39x = 100,367.31 × 40,898.61
  4. Step 4: Simplify right side
    72,730.39x = 4,104,883,468.44
  5. Step 5: Solve for x
    x = 4,104,883,468.44/72,730.39
  6. Step 6: Final answer
    x = 56,439.73

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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.