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Finding the Fourth Proportional to 215,759.56, 323,343.78 and 136,929.10

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Solution

The fourth proportional to 215,759.56, 323,343.78 and 136,929.10 is: 205,206.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,759.56 : 323,343.78 = 136,929.10 : x
  2. Step 2: Convert to fraction form
    215,759.56/323,343.78 = 136,929.10/x
  3. Step 3: Cross multiply
    215,759.56x = 323,343.78 × 136,929.10
  4. Step 4: Simplify right side
    215,759.56x = 44,275,172,786.00
  5. Step 5: Solve for x
    x = 44,275,172,786.00/215,759.56
  6. Step 6: Final answer
    x = 205,206.08

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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.