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Finding the Fourth Proportional to 219,044.70, 328,324.05 and 85,880.70

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Solution

The fourth proportional to 219,044.70, 328,324.05 and 85,880.70 is: 128,725.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,044.70 : 328,324.05 = 85,880.70 : x
  2. Step 2: Convert to fraction form
    219,044.70/328,324.05 = 85,880.70/x
  3. Step 3: Cross multiply
    219,044.70x = 328,324.05 × 85,880.70
  4. Step 4: Simplify right side
    219,044.70x = 28,196,699,240.84
  5. Step 5: Solve for x
    x = 28,196,699,240.84/219,044.70
  6. Step 6: Final answer
    x = 128,725.78

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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.