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Finding the Fourth Proportional to 74.40, 110.97 and 70.54

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Solution

The fourth proportional to 74.40, 110.97 and 70.54 is: 105.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.40 : 110.97 = 70.54 : x
  2. Step 2: Convert to fraction form
    74.40/110.97 = 70.54/x
  3. Step 3: Cross multiply
    74.40x = 110.97 × 70.54
  4. Step 4: Simplify right side
    74.40x = 7,827.82
  5. Step 5: Solve for x
    x = 7,827.82/74.40
  6. Step 6: Final answer
    x = 105.21

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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.