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Finding the Fourth Proportional to 67,166.10, 100,745.50 and 20,415.33

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Solution

The fourth proportional to 67,166.10, 100,745.50 and 20,415.33 is: 30,621.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,166.10 : 100,745.50 = 20,415.33 : x
  2. Step 2: Convert to fraction form
    67,166.10/100,745.50 = 20,415.33/x
  3. Step 3: Cross multiply
    67,166.10x = 100,745.50 × 20,415.33
  4. Step 4: Simplify right side
    67,166.10x = 2,056,752,628.52
  5. Step 5: Solve for x
    x = 2,056,752,628.52/67,166.10
  6. Step 6: Final answer
    x = 30,621.89

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1.5x scale

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.