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Finding the Fourth Proportional to 72,957.99, 109,438.08 and 20,367.75

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Solution

The fourth proportional to 72,957.99, 109,438.08 and 20,367.75 is: 30,551.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,957.99 : 109,438.08 = 20,367.75 : x
  2. Step 2: Convert to fraction form
    72,957.99/109,438.08 = 20,367.75/x
  3. Step 3: Cross multiply
    72,957.99x = 109,438.08 × 20,367.75
  4. Step 4: Simplify right side
    72,957.99x = 2,229,007,453.92
  5. Step 5: Solve for x
    x = 2,229,007,453.92/72,957.99
  6. Step 6: Final answer
    x = 30,551.93

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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.