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Finding the Fourth Proportional to 65.81, 98.11 and 59.94

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Solution

The fourth proportional to 65.81, 98.11 and 59.94 is: 89.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.81 : 98.11 = 59.94 : x
  2. Step 2: Convert to fraction form
    65.81/98.11 = 59.94/x
  3. Step 3: Cross multiply
    65.81x = 98.11 × 59.94
  4. Step 4: Simplify right side
    65.81x = 5,880.79
  5. Step 5: Solve for x
    x = 5,880.79/65.81
  6. Step 6: Final answer
    x = 89.36

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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.