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Finding the Fourth Proportional to 70.93, 105.71 and 70.26

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Solution

The fourth proportional to 70.93, 105.71 and 70.26 is: 104.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.93 : 105.71 = 70.26 : x
  2. Step 2: Convert to fraction form
    70.93/105.71 = 70.26/x
  3. Step 3: Cross multiply
    70.93x = 105.71 × 70.26
  4. Step 4: Simplify right side
    70.93x = 7,427.18
  5. Step 5: Solve for x
    x = 7,427.18/70.93
  6. Step 6: Final answer
    x = 104.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.