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Finding the Third Proportional to 42,155 and 91,745.75

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Solution

The third proportional to 42,155 and 91,745.75 is: 199,674.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,155 : 91,745.75 = 91,745.75 : x
  2. Step 2: Convert to fraction form
    42,155/91,745.75 = 91,745.75/x
  3. Step 3: Cross multiply
    42,155x = 91,745.75 × 91,745.75
  4. Step 4: Simplify right side
    42,155x = 8,417,282,643.06
  5. Step 5: Solve for x
    x = 8,417,282,643.06/42,155
  6. Step 6: Final answer
    x = 199,674.60

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.