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Finding the Fourth Proportional to 219,382.60, 329,005.80 and 79,123

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Solution

The fourth proportional to 219,382.60, 329,005.80 and 79,123 is: 118,659.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,382.60 : 329,005.80 = 79,123 : x
  2. Step 2: Convert to fraction form
    219,382.60/329,005.80 = 79,123/x
  3. Step 3: Cross multiply
    219,382.60x = 329,005.80 × 79,123
  4. Step 4: Simplify right side
    219,382.60x = 26,031,925,913.40
  5. Step 5: Solve for x
    x = 26,031,925,913.40/219,382.60
  6. Step 6: Final answer
    x = 118,659.94

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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.