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Finding the Fourth Proportional to 69.93, 96.45 and 59.55

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Solution

The fourth proportional to 69.93, 96.45 and 59.55 is: 82.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.93 : 96.45 = 59.55 : x
  2. Step 2: Convert to fraction form
    69.93/96.45 = 59.55/x
  3. Step 3: Cross multiply
    69.93x = 96.45 × 59.55
  4. Step 4: Simplify right side
    69.93x = 5,743.60
  5. Step 5: Solve for x
    x = 5,743.60/69.93
  6. Step 6: Final answer
    x = 82.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.