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Finding the Fourth Proportional to 55.81, 83.71 and 23.31

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Solution

The fourth proportional to 55.81, 83.71 and 23.31 is: 34.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.81 : 83.71 = 23.31 : x
  2. Step 2: Convert to fraction form
    55.81/83.71 = 23.31/x
  3. Step 3: Cross multiply
    55.81x = 83.71 × 23.31
  4. Step 4: Simplify right side
    55.81x = 1,950.95
  5. Step 5: Solve for x
    x = 1,950.95/55.81
  6. Step 6: Final answer
    x = 34.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.