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Finding the Fourth Proportional to 219,881.70, 329,822.55 and 72,137.70

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Solution

The fourth proportional to 219,881.70, 329,822.55 and 72,137.70 is: 108,206.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,881.70 : 329,822.55 = 72,137.70 : x
  2. Step 2: Convert to fraction form
    219,881.70/329,822.55 = 72,137.70/x
  3. Step 3: Cross multiply
    219,881.70x = 329,822.55 × 72,137.70
  4. Step 4: Simplify right side
    219,881.70x = 23,792,640,165.14
  5. Step 5: Solve for x
    x = 23,792,640,165.14/219,881.70
  6. Step 6: Final answer
    x = 108,206.55

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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.