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Finding the Third Proportional to 71,490 and 106,389

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Solution

The third proportional to 71,490 and 106,389 is: 158,324.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,490 : 106,389 = 106,389 : x
  2. Step 2: Convert to fraction form
    71,490/106,389 = 106,389/x
  3. Step 3: Cross multiply
    71,490x = 106,389 × 106,389
  4. Step 4: Simplify right side
    71,490x = 11,318,619,321
  5. Step 5: Solve for x
    x = 11,318,619,321/71,490
  6. Step 6: Final answer
    x = 158,324.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.