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Finding the Fourth Proportional to 117.95, 162.80 and 83.03

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Solution

The fourth proportional to 117.95, 162.80 and 83.03 is: 114.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.95 : 162.80 = 83.03 : x
  2. Step 2: Convert to fraction form
    117.95/162.80 = 83.03/x
  3. Step 3: Cross multiply
    117.95x = 162.80 × 83.03
  4. Step 4: Simplify right side
    117.95x = 13,516.05
  5. Step 5: Solve for x
    x = 13,516.05/117.95
  6. Step 6: Final answer
    x = 114.60

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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.