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Finding the Fourth Proportional to 173.87, 260.64 and 86.01

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Solution

The fourth proportional to 173.87, 260.64 and 86.01 is: 128.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.87 : 260.64 = 86.01 : x
  2. Step 2: Convert to fraction form
    173.87/260.64 = 86.01/x
  3. Step 3: Cross multiply
    173.87x = 260.64 × 86.01
  4. Step 4: Simplify right side
    173.87x = 22,417.65
  5. Step 5: Solve for x
    x = 22,417.65/173.87
  6. Step 6: Final answer
    x = 128.94

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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.