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Finding the Fourth Proportional to 132.60, 183.09 and 91.20

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Solution

The fourth proportional to 132.60, 183.09 and 91.20 is: 125.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.60 : 183.09 = 91.20 : x
  2. Step 2: Convert to fraction form
    132.60/183.09 = 91.20/x
  3. Step 3: Cross multiply
    132.60x = 183.09 × 91.20
  4. Step 4: Simplify right side
    132.60x = 16,697.81
  5. Step 5: Solve for x
    x = 16,697.81/132.60
  6. Step 6: Final answer
    x = 125.93

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