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Finding the Fourth Proportional to 72,771.30, 100,447.56 and 42,568.83

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Solution

The fourth proportional to 72,771.30, 100,447.56 and 42,568.83 is: 58,758.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,771.30 : 100,447.56 = 42,568.83 : x
  2. Step 2: Convert to fraction form
    72,771.30/100,447.56 = 42,568.83/x
  3. Step 3: Cross multiply
    72,771.30x = 100,447.56 × 42,568.83
  4. Step 4: Simplify right side
    72,771.30x = 4,275,935,105.55
  5. Step 5: Solve for x
    x = 4,275,935,105.55/72,771.30
  6. Step 6: Final answer
    x = 58,758.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.