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Finding the Fourth Proportional to 117, 160.40 and 114.95

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Solution

The fourth proportional to 117, 160.40 and 114.95 is: 157.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    117 : 160.40 = 114.95 : x
  2. Step 2: Convert to fraction form
    117/160.40 = 114.95/x
  3. Step 3: Cross multiply
    117x = 160.40 × 114.95
  4. Step 4: Simplify right side
    117x = 18,436.60
  5. Step 5: Solve for x
    x = 18,436.60/117
  6. Step 6: Final answer
    x = 157.58

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.