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Finding the Fourth Proportional to 173.37, 239.29 and 99.70

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Solution

The fourth proportional to 173.37, 239.29 and 99.70 is: 137.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.37 : 239.29 = 99.70 : x
  2. Step 2: Convert to fraction form
    173.37/239.29 = 99.70/x
  3. Step 3: Cross multiply
    173.37x = 239.29 × 99.70
  4. Step 4: Simplify right side
    173.37x = 23,856.37
  5. Step 5: Solve for x
    x = 23,856.37/173.37
  6. Step 6: Final answer
    x = 137.60

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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.