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Finding the Fourth Proportional to 173.55, 260.25 and 51.81

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Solution

The fourth proportional to 173.55, 260.25 and 51.81 is: 77.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.55 : 260.25 = 51.81 : x
  2. Step 2: Convert to fraction form
    173.55/260.25 = 51.81/x
  3. Step 3: Cross multiply
    173.55x = 260.25 × 51.81
  4. Step 4: Simplify right side
    173.55x = 13,483.55
  5. Step 5: Solve for x
    x = 13,483.55/173.55
  6. Step 6: Final answer
    x = 77.69

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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.