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Finding the Fourth Proportional to 115.84, 172.24 and 114.64

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Solution

The fourth proportional to 115.84, 172.24 and 114.64 is: 170.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.84 : 172.24 = 114.64 : x
  2. Step 2: Convert to fraction form
    115.84/172.24 = 114.64/x
  3. Step 3: Cross multiply
    115.84x = 172.24 × 114.64
  4. Step 4: Simplify right side
    115.84x = 19,745.59
  5. Step 5: Solve for x
    x = 19,745.59/115.84
  6. Step 6: Final answer
    x = 170.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.