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Finding the Fourth Proportional to 219,917.40, 329,730.30 and 79,657.80

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Solution

The fourth proportional to 219,917.40, 329,730.30 and 79,657.80 is: 119,433.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,917.40 : 329,730.30 = 79,657.80 : x
  2. Step 2: Convert to fraction form
    219,917.40/329,730.30 = 79,657.80/x
  3. Step 3: Cross multiply
    219,917.40x = 329,730.30 × 79,657.80
  4. Step 4: Simplify right side
    219,917.40x = 26,265,590,291.34
  5. Step 5: Solve for x
    x = 26,265,590,291.34/219,917.40
  6. Step 6: Final answer
    x = 119,433.89

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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.