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Finding the Fourth Proportional to 119.64, 180.47 and 114.60

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Solution

The fourth proportional to 119.64, 180.47 and 114.60 is: 172.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.64 : 180.47 = 114.60 : x
  2. Step 2: Convert to fraction form
    119.64/180.47 = 114.60/x
  3. Step 3: Cross multiply
    119.64x = 180.47 × 114.60
  4. Step 4: Simplify right side
    119.64x = 20,681.86
  5. Step 5: Solve for x
    x = 20,681.86/119.64
  6. Step 6: Final answer
    x = 172.87

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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.