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Finding the Fourth Proportional to 219,912.30, 329,868.45 and 143,804.70

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Solution

The fourth proportional to 219,912.30, 329,868.45 and 143,804.70 is: 215,707.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,912.30 : 329,868.45 = 143,804.70 : x
  2. Step 2: Convert to fraction form
    219,912.30/329,868.45 = 143,804.70/x
  3. Step 3: Cross multiply
    219,912.30x = 329,868.45 × 143,804.70
  4. Step 4: Simplify right side
    219,912.30x = 47,436,633,491.72
  5. Step 5: Solve for x
    x = 47,436,633,491.72/219,912.30
  6. Step 6: Final answer
    x = 215,707.05

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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.