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Finding the Fourth Proportional to 59.89, 89.28 and 55.57

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Solution

The fourth proportional to 59.89, 89.28 and 55.57 is: 82.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.89 : 89.28 = 55.57 : x
  2. Step 2: Convert to fraction form
    59.89/89.28 = 55.57/x
  3. Step 3: Cross multiply
    59.89x = 89.28 × 55.57
  4. Step 4: Simplify right side
    59.89x = 4,961.29
  5. Step 5: Solve for x
    x = 4,961.29/59.89
  6. Step 6: Final answer
    x = 82.84

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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.