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Finding the Fourth Proportional to 59.76, 81.88 and 59.60

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Solution

The fourth proportional to 59.76, 81.88 and 59.60 is: 81.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.76 : 81.88 = 59.60 : x
  2. Step 2: Convert to fraction form
    59.76/81.88 = 59.60/x
  3. Step 3: Cross multiply
    59.76x = 81.88 × 59.60
  4. Step 4: Simplify right side
    59.76x = 4,880.05
  5. Step 5: Solve for x
    x = 4,880.05/59.76
  6. Step 6: Final answer
    x = 81.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.