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Finding the Fourth Proportional to 45,000, 62,100 and 25,128

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Solution

The fourth proportional to 45,000, 62,100 and 25,128 is: 34,676.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,000 : 62,100 = 25,128 : x
  2. Step 2: Convert to fraction form
    45,000/62,100 = 25,128/x
  3. Step 3: Cross multiply
    45,000x = 62,100 × 25,128
  4. Step 4: Simplify right side
    45,000x = 1,560,448,800
  5. Step 5: Solve for x
    x = 1,560,448,800/45,000
  6. Step 6: Final answer
    x = 34,676.64

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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.