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Finding the Fourth Proportional to 72,438.48, 99,993.42 and 48,556.44

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Solution

The fourth proportional to 72,438.48, 99,993.42 and 48,556.44 is: 67,026.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,438.48 : 99,993.42 = 48,556.44 : x
  2. Step 2: Convert to fraction form
    72,438.48/99,993.42 = 48,556.44/x
  3. Step 3: Cross multiply
    72,438.48x = 99,993.42 × 48,556.44
  4. Step 4: Simplify right side
    72,438.48x = 4,855,324,498.62
  5. Step 5: Solve for x
    x = 4,855,324,498.62/72,438.48
  6. Step 6: Final answer
    x = 67,026.87

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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.