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Finding the Fourth Proportional to 173.63, 239.72 and 156.09

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Solution

The fourth proportional to 173.63, 239.72 and 156.09 is: 215.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.63 : 239.72 = 156.09 : x
  2. Step 2: Convert to fraction form
    173.63/239.72 = 156.09/x
  3. Step 3: Cross multiply
    173.63x = 239.72 × 156.09
  4. Step 4: Simplify right side
    173.63x = 37,417.89
  5. Step 5: Solve for x
    x = 37,417.89/173.63
  6. Step 6: Final answer
    x = 215.50

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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.