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Finding the Fourth Proportional to 58.79, 81.11 and 38.09

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Solution

The fourth proportional to 58.79, 81.11 and 38.09 is: 52.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.79 : 81.11 = 38.09 : x
  2. Step 2: Convert to fraction form
    58.79/81.11 = 38.09/x
  3. Step 3: Cross multiply
    58.79x = 81.11 × 38.09
  4. Step 4: Simplify right side
    58.79x = 3,089.78
  5. Step 5: Solve for x
    x = 3,089.78/58.79
  6. Step 6: Final answer
    x = 52.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.