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Finding the Fourth Proportional to 179,430.97, 268,945.29 and 72,790.15

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Solution

The fourth proportional to 179,430.97, 268,945.29 and 72,790.15 is: 109,103.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,430.97 : 268,945.29 = 72,790.15 : x
  2. Step 2: Convert to fraction form
    179,430.97/268,945.29 = 72,790.15/x
  3. Step 3: Cross multiply
    179,430.97x = 268,945.29 × 72,790.15
  4. Step 4: Simplify right side
    179,430.97x = 19,576,568,000.89
  5. Step 5: Solve for x
    x = 19,576,568,000.89/179,430.97
  6. Step 6: Final answer
    x = 109,103.62

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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.