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Finding the Fourth Proportional to 153.68, 211.86 and 130.30

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Solution

The fourth proportional to 153.68, 211.86 and 130.30 is: 179.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.68 : 211.86 = 130.30 : x
  2. Step 2: Convert to fraction form
    153.68/211.86 = 130.30/x
  3. Step 3: Cross multiply
    153.68x = 211.86 × 130.30
  4. Step 4: Simplify right side
    153.68x = 27,604.83
  5. Step 5: Solve for x
    x = 27,604.83/153.68
  6. Step 6: Final answer
    x = 179.63

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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.