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Finding the Fourth Proportional to 150.18, 207 and 123.99

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Solution

The fourth proportional to 150.18, 207 and 123.99 is: 170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.18 : 207 = 123.99 : x
  2. Step 2: Convert to fraction form
    150.18/207 = 123.99/x
  3. Step 3: Cross multiply
    150.18x = 207 × 123.99
  4. Step 4: Simplify right side
    150.18x = 25,665.93
  5. Step 5: Solve for x
    x = 25,665.93/150.18
  6. Step 6: Final answer
    x = 170.90

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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.