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Finding the Third Proportional to 86,720 and 189,156

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Solution

The third proportional to 86,720 and 189,156 is: 412,592.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,720 : 189,156 = 189,156 : x
  2. Step 2: Convert to fraction form
    86,720/189,156 = 189,156/x
  3. Step 3: Cross multiply
    86,720x = 189,156 × 189,156
  4. Step 4: Simplify right side
    86,720x = 35,779,992,336
  5. Step 5: Solve for x
    x = 35,779,992,336/86,720
  6. Step 6: Final answer
    x = 412,592.16

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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.