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Finding the Fourth Proportional to 105.25, 157.80 and 44.40

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Solution

The fourth proportional to 105.25, 157.80 and 44.40 is: 66.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.25 : 157.80 = 44.40 : x
  2. Step 2: Convert to fraction form
    105.25/157.80 = 44.40/x
  3. Step 3: Cross multiply
    105.25x = 157.80 × 44.40
  4. Step 4: Simplify right side
    105.25x = 7,006.32
  5. Step 5: Solve for x
    x = 7,006.32/105.25
  6. Step 6: Final answer
    x = 66.57

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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.