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Finding the Fourth Proportional to 173.12, 239.15 and 153.53

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Solution

The fourth proportional to 173.12, 239.15 and 153.53 is: 212.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.12 : 239.15 = 153.53 : x
  2. Step 2: Convert to fraction form
    173.12/239.15 = 153.53/x
  3. Step 3: Cross multiply
    173.12x = 239.15 × 153.53
  4. Step 4: Simplify right side
    173.12x = 36,714.74
  5. Step 5: Solve for x
    x = 36,714.74/173.12
  6. Step 6: Final answer
    x = 212.08

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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.