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Finding the Fourth Proportional to 69.93, 104.51 and 59.85

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Solution

The fourth proportional to 69.93, 104.51 and 59.85 is: 89.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.93 : 104.51 = 59.85 : x
  2. Step 2: Convert to fraction form
    69.93/104.51 = 59.85/x
  3. Step 3: Cross multiply
    69.93x = 104.51 × 59.85
  4. Step 4: Simplify right side
    69.93x = 6,255.07
  5. Step 5: Solve for x
    x = 6,255.07/69.93
  6. Step 6: Final answer
    x = 89.45

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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.