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Finding the Fourth Proportional to 73,136.86, 109,725.94 and 20,546.80

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Solution

The fourth proportional to 73,136.86, 109,725.94 and 20,546.80 is: 30,826.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,136.86 : 109,725.94 = 20,546.80 : x
  2. Step 2: Convert to fraction form
    73,136.86/109,725.94 = 20,546.80/x
  3. Step 3: Cross multiply
    73,136.86x = 109,725.94 × 20,546.80
  4. Step 4: Simplify right side
    73,136.86x = 2,254,516,943.99
  5. Step 5: Solve for x
    x = 2,254,516,943.99/73,136.86
  6. Step 6: Final answer
    x = 30,826.00

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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.