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Finding the Fourth Proportional to 78.98, 118.58 and 44.81

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Solution

The fourth proportional to 78.98, 118.58 and 44.81 is: 67.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.98 : 118.58 = 44.81 : x
  2. Step 2: Convert to fraction form
    78.98/118.58 = 44.81/x
  3. Step 3: Cross multiply
    78.98x = 118.58 × 44.81
  4. Step 4: Simplify right side
    78.98x = 5,313.57
  5. Step 5: Solve for x
    x = 5,313.57/78.98
  6. Step 6: Final answer
    x = 67.28

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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.