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Finding the Fourth Proportional to 115.76, 174.24 and 96.64

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Solution

The fourth proportional to 115.76, 174.24 and 96.64 is: 145.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.76 : 174.24 = 96.64 : x
  2. Step 2: Convert to fraction form
    115.76/174.24 = 96.64/x
  3. Step 3: Cross multiply
    115.76x = 174.24 × 96.64
  4. Step 4: Simplify right side
    115.76x = 16,838.55
  5. Step 5: Solve for x
    x = 16,838.55/115.76
  6. Step 6: Final answer
    x = 145.46

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.