Home / 219,333.78-329,136.03-86,190.66

Finding the Fourth Proportional to 219,333.78, 329,136.03 and 86,190.66

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Solution

The fourth proportional to 219,333.78, 329,136.03 and 86,190.66 is: 129,339.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,333.78 : 329,136.03 = 86,190.66 : x
  2. Step 2: Convert to fraction form
    219,333.78/329,136.03 = 86,190.66/x
  3. Step 3: Cross multiply
    219,333.78x = 329,136.03 × 86,190.66
  4. Step 4: Simplify right side
    219,333.78x = 28,368,451,655.48
  5. Step 5: Solve for x
    x = 28,368,451,655.48/219,333.78
  6. Step 6: Final answer
    x = 129,339.18

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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.