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Finding the Fourth Proportional to 72,750.68, 109,127.73 and 20,160.62

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Solution

The fourth proportional to 72,750.68, 109,127.73 and 20,160.62 is: 30,241.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,750.68 : 109,127.73 = 20,160.62 : x
  2. Step 2: Convert to fraction form
    72,750.68/109,127.73 = 20,160.62/x
  3. Step 3: Cross multiply
    72,750.68x = 109,127.73 × 20,160.62
  4. Step 4: Simplify right side
    72,750.68x = 2,200,082,695.99
  5. Step 5: Solve for x
    x = 2,200,082,695.99/72,750.68
  6. Step 6: Final answer
    x = 30,241.40

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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.