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Finding the Fourth Proportional to 150.12, 207.06 and 100.31

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Solution

The fourth proportional to 150.12, 207.06 and 100.31 is: 138.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.12 : 207.06 = 100.31 : x
  2. Step 2: Convert to fraction form
    150.12/207.06 = 100.31/x
  3. Step 3: Cross multiply
    150.12x = 207.06 × 100.31
  4. Step 4: Simplify right side
    150.12x = 20,768.78
  5. Step 5: Solve for x
    x = 20,768.78/150.12
  6. Step 6: Final answer
    x = 138.35

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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.