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Finding the Fourth Proportional to 219,873.70, 329,810.55 and 72,129.70

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Solution

The fourth proportional to 219,873.70, 329,810.55 and 72,129.70 is: 108,194.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,873.70 : 329,810.55 = 72,129.70 : x
  2. Step 2: Convert to fraction form
    219,873.70/329,810.55 = 72,129.70/x
  3. Step 3: Cross multiply
    219,873.70x = 329,810.55 × 72,129.70
  4. Step 4: Simplify right side
    219,873.70x = 23,789,136,028.34
  5. Step 5: Solve for x
    x = 23,789,136,028.34/219,873.70
  6. Step 6: Final answer
    x = 108,194.55

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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.