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Finding the Fourth Proportional to 72,067.74, 99,424.87 and 48,156.54

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Solution

The fourth proportional to 72,067.74, 99,424.87 and 48,156.54 is: 66,436.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,067.74 : 99,424.87 = 48,156.54 : x
  2. Step 2: Convert to fraction form
    72,067.74/99,424.87 = 48,156.54/x
  3. Step 3: Cross multiply
    72,067.74x = 99,424.87 × 48,156.54
  4. Step 4: Simplify right side
    72,067.74x = 4,787,957,729.15
  5. Step 5: Solve for x
    x = 4,787,957,729.15/72,067.74
  6. Step 6: Final answer
    x = 66,436.91

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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.