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Finding the Third Proportional to 58,910 and 128,188

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Solution

The third proportional to 58,910 and 128,188 is: 278,936.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,910 : 128,188 = 128,188 : x
  2. Step 2: Convert to fraction form
    58,910/128,188 = 128,188/x
  3. Step 3: Cross multiply
    58,910x = 128,188 × 128,188
  4. Step 4: Simplify right side
    58,910x = 16,432,163,344
  5. Step 5: Solve for x
    x = 16,432,163,344/58,910
  6. Step 6: Final answer
    x = 278,936.74

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.