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Finding the Fourth Proportional to 132.87, 183.35 and 74.64

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Solution

The fourth proportional to 132.87, 183.35 and 74.64 is: 102.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.87 : 183.35 = 74.64 : x
  2. Step 2: Convert to fraction form
    132.87/183.35 = 74.64/x
  3. Step 3: Cross multiply
    132.87x = 183.35 × 74.64
  4. Step 4: Simplify right side
    132.87x = 13,683.95
  5. Step 5: Solve for x
    x = 13,683.95/132.87
  6. Step 6: Final answer
    x = 102.99

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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.