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Finding the Fourth Proportional to 59.86, 89.81 and 51.79

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Solution

The fourth proportional to 59.86, 89.81 and 51.79 is: 77.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.86 : 89.81 = 51.79 : x
  2. Step 2: Convert to fraction form
    59.86/89.81 = 51.79/x
  3. Step 3: Cross multiply
    59.86x = 89.81 × 51.79
  4. Step 4: Simplify right side
    59.86x = 4,651.14
  5. Step 5: Solve for x
    x = 4,651.14/59.86
  6. Step 6: Final answer
    x = 77.70

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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.