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Finding the Fourth Proportional to 70.93, 105.89 and 61.35

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Solution

The fourth proportional to 70.93, 105.89 and 61.35 is: 91.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.93 : 105.89 = 61.35 : x
  2. Step 2: Convert to fraction form
    70.93/105.89 = 61.35/x
  3. Step 3: Cross multiply
    70.93x = 105.89 × 61.35
  4. Step 4: Simplify right side
    70.93x = 6,496.35
  5. Step 5: Solve for x
    x = 6,496.35/70.93
  6. Step 6: Final answer
    x = 91.59

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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.