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Finding the Fourth Proportional to 58.06, 80.12 and 39.61

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Solution

The fourth proportional to 58.06, 80.12 and 39.61 is: 54.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.06 : 80.12 = 39.61 : x
  2. Step 2: Convert to fraction form
    58.06/80.12 = 39.61/x
  3. Step 3: Cross multiply
    58.06x = 80.12 × 39.61
  4. Step 4: Simplify right side
    58.06x = 3,173.55
  5. Step 5: Solve for x
    x = 3,173.55/58.06
  6. Step 6: Final answer
    x = 54.66

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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.