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Finding the Fourth Proportional to 55,339.68, 76,368.60 and 30,189

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Solution

The fourth proportional to 55,339.68, 76,368.60 and 30,189 is: 41,660.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,339.68 : 76,368.60 = 30,189 : x
  2. Step 2: Convert to fraction form
    55,339.68/76,368.60 = 30,189/x
  3. Step 3: Cross multiply
    55,339.68x = 76,368.60 × 30,189
  4. Step 4: Simplify right side
    55,339.68x = 2,305,491,665.40
  5. Step 5: Solve for x
    x = 2,305,491,665.40/55,339.68
  6. Step 6: Final answer
    x = 41,660.73

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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.