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Finding the Third Proportional to 56,358 and 78,786

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Solution

The third proportional to 56,358 and 78,786 is: 110,139.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,358 : 78,786 = 78,786 : x
  2. Step 2: Convert to fraction form
    56,358/78,786 = 78,786/x
  3. Step 3: Cross multiply
    56,358x = 78,786 × 78,786
  4. Step 4: Simplify right side
    56,358x = 6,207,233,796
  5. Step 5: Solve for x
    x = 6,207,233,796/56,358
  6. Step 6: Final answer
    x = 110,139.36

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.