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Finding the Fourth Proportional to 72,993.70, 100,723.78 and 53,883.64

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Solution

The fourth proportional to 72,993.70, 100,723.78 and 53,883.64 is: 74,353.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,993.70 : 100,723.78 = 53,883.64 : x
  2. Step 2: Convert to fraction form
    72,993.70/100,723.78 = 53,883.64/x
  3. Step 3: Cross multiply
    72,993.70x = 100,723.78 × 53,883.64
  4. Step 4: Simplify right side
    72,993.70x = 5,427,363,900.96
  5. Step 5: Solve for x
    x = 5,427,363,900.96/72,993.70
  6. Step 6: Final answer
    x = 74,353.87

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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.