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Finding the Fourth Proportional to 63.09, 86.90 and 45.61

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Solution

The fourth proportional to 63.09, 86.90 and 45.61 is: 62.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.09 : 86.90 = 45.61 : x
  2. Step 2: Convert to fraction form
    63.09/86.90 = 45.61/x
  3. Step 3: Cross multiply
    63.09x = 86.90 × 45.61
  4. Step 4: Simplify right side
    63.09x = 3,963.06
  5. Step 5: Solve for x
    x = 3,963.06/63.09
  6. Step 6: Final answer
    x = 62.82

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