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Finding the Fourth Proportional to 69.93, 96.48 and 55.35

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Solution

The fourth proportional to 69.93, 96.48 and 55.35 is: 76.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.93 : 96.48 = 55.35 : x
  2. Step 2: Convert to fraction form
    69.93/96.48 = 55.35/x
  3. Step 3: Cross multiply
    69.93x = 96.48 × 55.35
  4. Step 4: Simplify right side
    69.93x = 5,340.17
  5. Step 5: Solve for x
    x = 5,340.17/69.93
  6. Step 6: Final answer
    x = 76.36

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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.