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Finding the Third Proportional to 42,643.50 and 66,891.75

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Solution

The third proportional to 42,643.50 and 66,891.75 is: 104,928.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,643.50 : 66,891.75 = 66,891.75 : x
  2. Step 2: Convert to fraction form
    42,643.50/66,891.75 = 66,891.75/x
  3. Step 3: Cross multiply
    42,643.50x = 66,891.75 × 66,891.75
  4. Step 4: Simplify right side
    42,643.50x = 4,474,506,218.06
  5. Step 5: Solve for x
    x = 4,474,506,218.06/42,643.50
  6. Step 6: Final answer
    x = 104,928.21

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.