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Finding the Third Proportional to 64,686.94 and 90,645.75

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Solution

The third proportional to 64,686.94 and 90,645.75 is: 127,021.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,686.94 : 90,645.75 = 90,645.75 : x
  2. Step 2: Convert to fraction form
    64,686.94/90,645.75 = 90,645.75/x
  3. Step 3: Cross multiply
    64,686.94x = 90,645.75 × 90,645.75
  4. Step 4: Simplify right side
    64,686.94x = 8,216,651,993.06
  5. Step 5: Solve for x
    x = 8,216,651,993.06/64,686.94
  6. Step 6: Final answer
    x = 127,021.81

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.