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Finding the Fourth Proportional to 72,452.70, 108,642.60 and 42,879.60

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Solution

The fourth proportional to 72,452.70, 108,642.60 and 42,879.60 is: 64,297.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,452.70 : 108,642.60 = 42,879.60 : x
  2. Step 2: Convert to fraction form
    72,452.70/108,642.60 = 42,879.60/x
  3. Step 3: Cross multiply
    72,452.70x = 108,642.60 × 42,879.60
  4. Step 4: Simplify right side
    72,452.70x = 4,658,551,230.96
  5. Step 5: Solve for x
    x = 4,658,551,230.96/72,452.70
  6. Step 6: Final answer
    x = 64,297.83

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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.