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Finding the Fourth Proportional to 119.07, 163.89 and 117.72

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Solution

The fourth proportional to 119.07, 163.89 and 117.72 is: 162.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.07 : 163.89 = 117.72 : x
  2. Step 2: Convert to fraction form
    119.07/163.89 = 117.72/x
  3. Step 3: Cross multiply
    119.07x = 163.89 × 117.72
  4. Step 4: Simplify right side
    119.07x = 19,293.13
  5. Step 5: Solve for x
    x = 19,293.13/119.07
  6. Step 6: Final answer
    x = 162.03

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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.