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Finding the Fourth Proportional to 72,130.58, 108,251.70 and 47,163.86

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Solution

The fourth proportional to 72,130.58, 108,251.70 and 47,163.86 is: 70,782.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,130.58 : 108,251.70 = 47,163.86 : x
  2. Step 2: Convert to fraction form
    72,130.58/108,251.70 = 47,163.86/x
  3. Step 3: Cross multiply
    72,130.58x = 108,251.70 × 47,163.86
  4. Step 4: Simplify right side
    72,130.58x = 5,105,568,023.56
  5. Step 5: Solve for x
    x = 5,105,568,023.56/72,130.58
  6. Step 6: Final answer
    x = 70,782.30

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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.