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Finding the Fourth Proportional to 173.64, 260.31 and 86.93

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Solution

The fourth proportional to 173.64, 260.31 and 86.93 is: 130.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.64 : 260.31 = 86.93 : x
  2. Step 2: Convert to fraction form
    173.64/260.31 = 86.93/x
  3. Step 3: Cross multiply
    173.64x = 260.31 × 86.93
  4. Step 4: Simplify right side
    173.64x = 22,627.45
  5. Step 5: Solve for x
    x = 22,627.45/173.64
  6. Step 6: Final answer
    x = 130.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.