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Finding the Fourth Proportional to 105.18, 157.70 and 41

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Solution

The fourth proportional to 105.18, 157.70 and 41 is: 61.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.18 : 157.70 = 41 : x
  2. Step 2: Convert to fraction form
    105.18/157.70 = 41/x
  3. Step 3: Cross multiply
    105.18x = 157.70 × 41
  4. Step 4: Simplify right side
    105.18x = 6,465.70
  5. Step 5: Solve for x
    x = 6,465.70/105.18
  6. Step 6: Final answer
    x = 61.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.