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Finding the Fourth Proportional to 150.07, 207.03 and 87.90

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Solution

The fourth proportional to 150.07, 207.03 and 87.90 is: 121.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.07 : 207.03 = 87.90 : x
  2. Step 2: Convert to fraction form
    150.07/207.03 = 87.90/x
  3. Step 3: Cross multiply
    150.07x = 207.03 × 87.90
  4. Step 4: Simplify right side
    150.07x = 18,198.41
  5. Step 5: Solve for x
    x = 18,198.41/150.07
  6. Step 6: Final answer
    x = 121.27

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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.