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Finding the Fourth Proportional to 123,388.34, 185,089.08 and 39,155.09

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Solution

The fourth proportional to 123,388.34, 185,089.08 and 39,155.09 is: 58,734.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,388.34 : 185,089.08 = 39,155.09 : x
  2. Step 2: Convert to fraction form
    123,388.34/185,089.08 = 39,155.09/x
  3. Step 3: Cross multiply
    123,388.34x = 185,089.08 × 39,155.09
  4. Step 4: Simplify right side
    123,388.34x = 7,247,178,659.97
  5. Step 5: Solve for x
    x = 7,247,178,659.97/123,388.34
  6. Step 6: Final answer
    x = 58,734.71

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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.