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Finding the Fourth Proportional to 90,785, 125,283.30 and 51,041

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Solution

The fourth proportional to 90,785, 125,283.30 and 51,041 is: 70,436.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,785 : 125,283.30 = 51,041 : x
  2. Step 2: Convert to fraction form
    90,785/125,283.30 = 51,041/x
  3. Step 3: Cross multiply
    90,785x = 125,283.30 × 51,041
  4. Step 4: Simplify right side
    90,785x = 6,394,584,915.30
  5. Step 5: Solve for x
    x = 6,394,584,915.30/90,785
  6. Step 6: Final answer
    x = 70,436.58

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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.