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Finding the Third Proportional to 86,208 and 129,429

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Solution

The third proportional to 86,208 and 129,429 is: 194,319.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,208 : 129,429 = 129,429 : x
  2. Step 2: Convert to fraction form
    86,208/129,429 = 129,429/x
  3. Step 3: Cross multiply
    86,208x = 129,429 × 129,429
  4. Step 4: Simplify right side
    86,208x = 16,751,866,041
  5. Step 5: Solve for x
    x = 16,751,866,041/86,208
  6. Step 6: Final answer
    x = 194,319.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.