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Finding the Fourth Proportional to 173.29, 239.08 and 99.59

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Solution

The fourth proportional to 173.29, 239.08 and 99.59 is: 137.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.29 : 239.08 = 99.59 : x
  2. Step 2: Convert to fraction form
    173.29/239.08 = 99.59/x
  3. Step 3: Cross multiply
    173.29x = 239.08 × 99.59
  4. Step 4: Simplify right side
    173.29x = 23,808.88
  5. Step 5: Solve for x
    x = 23,808.88/173.29
  6. Step 6: Final answer
    x = 137.40

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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.