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Finding the Fourth Proportional to 219,638.70, 329,512.05 and 61,865.10

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Solution

The fourth proportional to 219,638.70, 329,512.05 and 61,865.10 is: 92,812.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,638.70 : 329,512.05 = 61,865.10 : x
  2. Step 2: Convert to fraction form
    219,638.70/329,512.05 = 61,865.10/x
  3. Step 3: Cross multiply
    219,638.70x = 329,512.05 × 61,865.10
  4. Step 4: Simplify right side
    219,638.70x = 20,385,295,924.46
  5. Step 5: Solve for x
    x = 20,385,295,924.46/219,638.70
  6. Step 6: Final answer
    x = 92,812.86

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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.