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Finding the Fourth Proportional to 219,518.72, 329,239.70 and 61,709.68

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Solution

The fourth proportional to 219,518.72, 329,239.70 and 61,709.68 is: 92,553.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,518.72 : 329,239.70 = 61,709.68 : x
  2. Step 2: Convert to fraction form
    219,518.72/329,239.70 = 61,709.68/x
  3. Step 3: Cross multiply
    219,518.72x = 329,239.70 × 61,709.68
  4. Step 4: Simplify right side
    219,518.72x = 20,317,276,530.30
  5. Step 5: Solve for x
    x = 20,317,276,530.30/219,518.72
  6. Step 6: Final answer
    x = 92,553.73

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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.