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Finding the Fourth Proportional to 90,884, 125,427.60 and 51,147.68

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Solution

The fourth proportional to 90,884, 125,427.60 and 51,147.68 is: 70,588.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,884 : 125,427.60 = 51,147.68 : x
  2. Step 2: Convert to fraction form
    90,884/125,427.60 = 51,147.68/x
  3. Step 3: Cross multiply
    90,884x = 125,427.60 × 51,147.68
  4. Step 4: Simplify right side
    90,884x = 6,415,330,747.97
  5. Step 5: Solve for x
    x = 6,415,330,747.97/90,884
  6. Step 6: Final answer
    x = 70,588.12

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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.