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Finding the Fourth Proportional to 69.61, 96.07 and 40.50

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Solution

The fourth proportional to 69.61, 96.07 and 40.50 is: 55.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.61 : 96.07 = 40.50 : x
  2. Step 2: Convert to fraction form
    69.61/96.07 = 40.50/x
  3. Step 3: Cross multiply
    69.61x = 96.07 × 40.50
  4. Step 4: Simplify right side
    69.61x = 3,890.81
  5. Step 5: Solve for x
    x = 3,890.81/69.61
  6. Step 6: Final answer
    x = 55.89

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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.