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Finding the Third Proportional to 66,422.53 and 71,890.03

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Solution

The third proportional to 66,422.53 and 71,890.03 is: 77,807.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.53 : 71,890.03 = 71,890.03 : x
  2. Step 2: Convert to fraction form
    66,422.53/71,890.03 = 71,890.03/x
  3. Step 3: Cross multiply
    66,422.53x = 71,890.03 × 71,890.03
  4. Step 4: Simplify right side
    66,422.53x = 5,168,176,593.13
  5. Step 5: Solve for x
    x = 5,168,176,593.13/66,422.53
  6. Step 6: Final answer
    x = 77,807.58

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.