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Finding the Fourth Proportional to 219,661.30, 329,581.23 and 79,431.22

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Solution

The fourth proportional to 219,661.30, 329,581.23 and 79,431.22 is: 119,179.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,661.30 : 329,581.23 = 79,431.22 : x
  2. Step 2: Convert to fraction form
    219,661.30/329,581.23 = 79,431.22/x
  3. Step 3: Cross multiply
    219,661.30x = 329,581.23 × 79,431.22
  4. Step 4: Simplify right side
    219,661.30x = 26,179,039,188.00
  5. Step 5: Solve for x
    x = 26,179,039,188.00/219,661.30
  6. Step 6: Final answer
    x = 119,179.11

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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.