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Finding the Fourth Proportional to 73,986.40, 110,906.70 and 36,515.80

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Solution

The fourth proportional to 73,986.40, 110,906.70 and 36,515.80 is: 54,737.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,986.40 : 110,906.70 = 36,515.80 : x
  2. Step 2: Convert to fraction form
    73,986.40/110,906.70 = 36,515.80/x
  3. Step 3: Cross multiply
    73,986.40x = 110,906.70 × 36,515.80
  4. Step 4: Simplify right side
    73,986.40x = 4,049,846,875.86
  5. Step 5: Solve for x
    x = 4,049,846,875.86/73,986.40
  6. Step 6: Final answer
    x = 54,737.72

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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.