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Finding the Fourth Proportional to 116.71, 174.99 and 55.78

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Solution

The fourth proportional to 116.71, 174.99 and 55.78 is: 83.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.71 : 174.99 = 55.78 : x
  2. Step 2: Convert to fraction form
    116.71/174.99 = 55.78/x
  3. Step 3: Cross multiply
    116.71x = 174.99 × 55.78
  4. Step 4: Simplify right side
    116.71x = 9,760.94
  5. Step 5: Solve for x
    x = 9,760.94/116.71
  6. Step 6: Final answer
    x = 83.63

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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.