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Finding the Fourth Proportional to 270.09, 405.05 and 123.75

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Solution

The fourth proportional to 270.09, 405.05 and 123.75 is: 185.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.09 : 405.05 = 123.75 : x
  2. Step 2: Convert to fraction form
    270.09/405.05 = 123.75/x
  3. Step 3: Cross multiply
    270.09x = 405.05 × 123.75
  4. Step 4: Simplify right side
    270.09x = 50,124.32
  5. Step 5: Solve for x
    x = 50,124.32/270.09
  6. Step 6: Final answer
    x = 185.58

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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.