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Finding the Fourth Proportional to 130.79, 180.63 and 119.69

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Solution

The fourth proportional to 130.79, 180.63 and 119.69 is: 165.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.79 : 180.63 = 119.69 : x
  2. Step 2: Convert to fraction form
    130.79/180.63 = 119.69/x
  3. Step 3: Cross multiply
    130.79x = 180.63 × 119.69
  4. Step 4: Simplify right side
    130.79x = 21,619.60
  5. Step 5: Solve for x
    x = 21,619.60/130.79
  6. Step 6: Final answer
    x = 165.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.