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Finding the Fourth Proportional to 74.67, 111.53 and 60.99

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Solution

The fourth proportional to 74.67, 111.53 and 60.99 is: 91.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.67 : 111.53 = 60.99 : x
  2. Step 2: Convert to fraction form
    74.67/111.53 = 60.99/x
  3. Step 3: Cross multiply
    74.67x = 111.53 × 60.99
  4. Step 4: Simplify right side
    74.67x = 6,801.91
  5. Step 5: Solve for x
    x = 6,801.91/74.67
  6. Step 6: Final answer
    x = 91.09

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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.