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Finding the Third Proportional to 67,681.50 and 99,213

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Solution

The third proportional to 67,681.50 and 99,213 is: 145,434.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,681.50 : 99,213 = 99,213 : x
  2. Step 2: Convert to fraction form
    67,681.50/99,213 = 99,213/x
  3. Step 3: Cross multiply
    67,681.50x = 99,213 × 99,213
  4. Step 4: Simplify right side
    67,681.50x = 9,843,219,369
  5. Step 5: Solve for x
    x = 9,843,219,369/67,681.50
  6. Step 6: Final answer
    x = 145,434.42

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.