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Finding the Fourth Proportional to 189,266.65, 261,203.67 and 108,709.72

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Solution

The fourth proportional to 189,266.65, 261,203.67 and 108,709.72 is: 150,028.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,266.65 : 261,203.67 = 108,709.72 : x
  2. Step 2: Convert to fraction form
    189,266.65/261,203.67 = 108,709.72/x
  3. Step 3: Cross multiply
    189,266.65x = 261,203.67 × 108,709.72
  4. Step 4: Simplify right side
    189,266.65x = 28,395,377,583.32
  5. Step 5: Solve for x
    x = 28,395,377,583.32/189,266.65
  6. Step 6: Final answer
    x = 150,028.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.