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Finding the Fourth Proportional to 99,485.96, 137,289.78 and 54,163.82

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Solution

The fourth proportional to 99,485.96, 137,289.78 and 54,163.82 is: 74,745.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,485.96 : 137,289.78 = 54,163.82 : x
  2. Step 2: Convert to fraction form
    99,485.96/137,289.78 = 54,163.82/x
  3. Step 3: Cross multiply
    99,485.96x = 137,289.78 × 54,163.82
  4. Step 4: Simplify right side
    99,485.96x = 7,436,138,931.76
  5. Step 5: Solve for x
    x = 7,436,138,931.76/99,485.96
  6. Step 6: Final answer
    x = 74,745.61

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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.