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Finding the Third Proportional to 114,639 and 128,855

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Solution

The third proportional to 114,639 and 128,855 is: 144,833.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,639 : 128,855 = 128,855 : x
  2. Step 2: Convert to fraction form
    114,639/128,855 = 128,855/x
  3. Step 3: Cross multiply
    114,639x = 128,855 × 128,855
  4. Step 4: Simplify right side
    114,639x = 16,603,611,025
  5. Step 5: Solve for x
    x = 16,603,611,025/114,639
  6. Step 6: Final answer
    x = 144,833.88

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Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.