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Finding the Fourth Proportional to 59.31, 88.96 and 18.75

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Solution

The fourth proportional to 59.31, 88.96 and 18.75 is: 28.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.31 : 88.96 = 18.75 : x
  2. Step 2: Convert to fraction form
    59.31/88.96 = 18.75/x
  3. Step 3: Cross multiply
    59.31x = 88.96 × 18.75
  4. Step 4: Simplify right side
    59.31x = 1,668.00
  5. Step 5: Solve for x
    x = 1,668.00/59.31
  6. Step 6: Final answer
    x = 28.12

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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.