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Finding the Fourth Proportional to 58.96, 81.42 and 39.32

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Solution

The fourth proportional to 58.96, 81.42 and 39.32 is: 54.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.96 : 81.42 = 39.32 : x
  2. Step 2: Convert to fraction form
    58.96/81.42 = 39.32/x
  3. Step 3: Cross multiply
    58.96x = 81.42 × 39.32
  4. Step 4: Simplify right side
    58.96x = 3,201.43
  5. Step 5: Solve for x
    x = 3,201.43/58.96
  6. Step 6: Final answer
    x = 54.30

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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.