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Finding the Fourth Proportional to 55,081.88, 82,622.61 and 15,638.99

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Solution

The fourth proportional to 55,081.88, 82,622.61 and 15,638.99 is: 23,458.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,081.88 : 82,622.61 = 15,638.99 : x
  2. Step 2: Convert to fraction form
    55,081.88/82,622.61 = 15,638.99/x
  3. Step 3: Cross multiply
    55,081.88x = 82,622.61 × 15,638.99
  4. Step 4: Simplify right side
    55,081.88x = 1,292,134,378.12
  5. Step 5: Solve for x
    x = 1,292,134,378.12/55,081.88
  6. Step 6: Final answer
    x = 23,458.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.