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Finding the Fourth Proportional to 74.77, 111.63 and 74.01

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Solution

The fourth proportional to 74.77, 111.63 and 74.01 is: 110.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.77 : 111.63 = 74.01 : x
  2. Step 2: Convert to fraction form
    74.77/111.63 = 74.01/x
  3. Step 3: Cross multiply
    74.77x = 111.63 × 74.01
  4. Step 4: Simplify right side
    74.77x = 8,262.02
  5. Step 5: Solve for x
    x = 8,262.02/74.77
  6. Step 6: Final answer
    x = 110.49

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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.