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Finding the Fourth Proportional to 153.69, 211.99 and 94.65

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Solution

The fourth proportional to 153.69, 211.99 and 94.65 is: 130.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.69 : 211.99 = 94.65 : x
  2. Step 2: Convert to fraction form
    153.69/211.99 = 94.65/x
  3. Step 3: Cross multiply
    153.69x = 211.99 × 94.65
  4. Step 4: Simplify right side
    153.69x = 20,064.85
  5. Step 5: Solve for x
    x = 20,064.85/153.69
  6. Step 6: Final answer
    x = 130.55

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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.