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Finding the Fourth Proportional to 219,860.70, 329,900.40 and 86,745.30

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Solution

The fourth proportional to 219,860.70, 329,900.40 and 86,745.30 is: 130,161.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,860.70 : 329,900.40 = 86,745.30 : x
  2. Step 2: Convert to fraction form
    219,860.70/329,900.40 = 86,745.30/x
  3. Step 3: Cross multiply
    219,860.70x = 329,900.40 × 86,745.30
  4. Step 4: Simplify right side
    219,860.70x = 28,617,309,168.12
  5. Step 5: Solve for x
    x = 28,617,309,168.12/219,860.70
  6. Step 6: Final answer
    x = 130,161.09

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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.