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Finding the Third Proportional to 56,780 and 86,547

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Solution

The third proportional to 56,780 and 86,547 is: 131,919.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,780 : 86,547 = 86,547 : x
  2. Step 2: Convert to fraction form
    56,780/86,547 = 86,547/x
  3. Step 3: Cross multiply
    56,780x = 86,547 × 86,547
  4. Step 4: Simplify right side
    56,780x = 7,490,383,209
  5. Step 5: Solve for x
    x = 7,490,383,209/56,780
  6. Step 6: Final answer
    x = 131,919.39

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.