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Finding the Fourth Proportional to 150.65, 225.66 and 78.29

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Solution

The fourth proportional to 150.65, 225.66 and 78.29 is: 117.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.65 : 225.66 = 78.29 : x
  2. Step 2: Convert to fraction form
    150.65/225.66 = 78.29/x
  3. Step 3: Cross multiply
    150.65x = 225.66 × 78.29
  4. Step 4: Simplify right side
    150.65x = 17,666.92
  5. Step 5: Solve for x
    x = 17,666.92/150.65
  6. Step 6: Final answer
    x = 117.27

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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.