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Finding the Fourth Proportional to 59.68, 89.09 and 54.28

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Solution

The fourth proportional to 59.68, 89.09 and 54.28 is: 81.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.68 : 89.09 = 54.28 : x
  2. Step 2: Convert to fraction form
    59.68/89.09 = 54.28/x
  3. Step 3: Cross multiply
    59.68x = 89.09 × 54.28
  4. Step 4: Simplify right side
    59.68x = 4,835.81
  5. Step 5: Solve for x
    x = 4,835.81/59.68
  6. Step 6: Final answer
    x = 81.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.