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Finding the Fourth Proportional to 52,163.80, 78,211.12 and 18,879.52

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Solution

The fourth proportional to 52,163.80, 78,211.12 and 18,879.52 is: 28,306.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,163.80 : 78,211.12 = 18,879.52 : x
  2. Step 2: Convert to fraction form
    52,163.80/78,211.12 = 18,879.52/x
  3. Step 3: Cross multiply
    52,163.80x = 78,211.12 × 18,879.52
  4. Step 4: Simplify right side
    52,163.80x = 1,476,588,404.26
  5. Step 5: Solve for x
    x = 1,476,588,404.26/52,163.80
  6. Step 6: Final answer
    x = 28,306.76

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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.