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Finding the Fourth Proportional to 219,121.25, 328,868.37 and 86,094.54

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Solution

The fourth proportional to 219,121.25, 328,868.37 and 86,094.54 is: 129,215.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,121.25 : 328,868.37 = 86,094.54 : x
  2. Step 2: Convert to fraction form
    219,121.25/328,868.37 = 86,094.54/x
  3. Step 3: Cross multiply
    219,121.25x = 328,868.37 × 86,094.54
  4. Step 4: Simplify right side
    219,121.25x = 28,313,771,035.70
  5. Step 5: Solve for x
    x = 28,313,771,035.70/219,121.25
  6. Step 6: Final answer
    x = 129,215.09

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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.