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Finding the Fourth Proportional to 219,989.17, 329,984.97 and 79,744.15

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Solution

The fourth proportional to 219,989.17, 329,984.97 and 79,744.15 is: 119,616.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,989.17 : 329,984.97 = 79,744.15 : x
  2. Step 2: Convert to fraction form
    219,989.17/329,984.97 = 79,744.15/x
  3. Step 3: Cross multiply
    219,989.17x = 329,984.97 × 79,744.15
  4. Step 4: Simplify right side
    219,989.17x = 26,314,370,945.43
  5. Step 5: Solve for x
    x = 26,314,370,945.43/219,989.17
  6. Step 6: Final answer
    x = 119,616.67

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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.