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Finding the Fourth Proportional to 150.19, 207.21 and 103.60

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Solution

The fourth proportional to 150.19, 207.21 and 103.60 is: 142.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.19 : 207.21 = 103.60 : x
  2. Step 2: Convert to fraction form
    150.19/207.21 = 103.60/x
  3. Step 3: Cross multiply
    150.19x = 207.21 × 103.60
  4. Step 4: Simplify right side
    150.19x = 21,467.93
  5. Step 5: Solve for x
    x = 21,467.93/150.19
  6. Step 6: Final answer
    x = 142.94

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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.