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Finding the Fourth Proportional to 219,044.20, 328,323.30 and 85,880.20

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Solution

The fourth proportional to 219,044.20, 328,323.30 and 85,880.20 is: 128,725.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,044.20 : 328,323.30 = 85,880.20 : x
  2. Step 2: Convert to fraction form
    219,044.20/328,323.30 = 85,880.20/x
  3. Step 3: Cross multiply
    219,044.20x = 328,323.30 × 85,880.20
  4. Step 4: Simplify right side
    219,044.20x = 28,196,470,668.66
  5. Step 5: Solve for x
    x = 28,196,470,668.66/219,044.20
  6. Step 6: Final answer
    x = 128,725.03

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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.