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Finding the Third Proportional to 57,078.75 and 90,903

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Solution

The third proportional to 57,078.75 and 90,903 is: 144,771.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,078.75 : 90,903 = 90,903 : x
  2. Step 2: Convert to fraction form
    57,078.75/90,903 = 90,903/x
  3. Step 3: Cross multiply
    57,078.75x = 90,903 × 90,903
  4. Step 4: Simplify right side
    57,078.75x = 8,263,355,409
  5. Step 5: Solve for x
    x = 8,263,355,409/57,078.75
  6. Step 6: Final answer
    x = 144,771.13

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.