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Finding the Fourth Proportional to 150.51, 225.53 and 69.31

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Solution

The fourth proportional to 150.51, 225.53 and 69.31 is: 103.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.51 : 225.53 = 69.31 : x
  2. Step 2: Convert to fraction form
    150.51/225.53 = 69.31/x
  3. Step 3: Cross multiply
    150.51x = 225.53 × 69.31
  4. Step 4: Simplify right side
    150.51x = 15,631.48
  5. Step 5: Solve for x
    x = 15,631.48/150.51
  6. Step 6: Final answer
    x = 103.86

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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.