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Finding the Fourth Proportional to 219,378.30, 329,067.45 and 61,611.90

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Solution

The fourth proportional to 219,378.30, 329,067.45 and 61,611.90 is: 92,417.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,378.30 : 329,067.45 = 61,611.90 : x
  2. Step 2: Convert to fraction form
    219,378.30/329,067.45 = 61,611.90/x
  3. Step 3: Cross multiply
    219,378.30x = 329,067.45 × 61,611.90
  4. Step 4: Simplify right side
    219,378.30x = 20,274,470,822.66
  5. Step 5: Solve for x
    x = 20,274,470,822.66/219,378.30
  6. Step 6: Final answer
    x = 92,417.85

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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.