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Finding the Fourth Proportional to 153.63, 211.88 and 95.31

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Solution

The fourth proportional to 153.63, 211.88 and 95.31 is: 131.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.63 : 211.88 = 95.31 : x
  2. Step 2: Convert to fraction form
    153.63/211.88 = 95.31/x
  3. Step 3: Cross multiply
    153.63x = 211.88 × 95.31
  4. Step 4: Simplify right side
    153.63x = 20,194.52
  5. Step 5: Solve for x
    x = 20,194.52/153.63
  6. Step 6: Final answer
    x = 131.45

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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.