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Finding the Third Proportional to 45,279 and 70,412

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Solution

The third proportional to 45,279 and 70,412 is: 109,495.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,279 : 70,412 = 70,412 : x
  2. Step 2: Convert to fraction form
    45,279/70,412 = 70,412/x
  3. Step 3: Cross multiply
    45,279x = 70,412 × 70,412
  4. Step 4: Simplify right side
    45,279x = 4,957,849,744
  5. Step 5: Solve for x
    x = 4,957,849,744/45,279
  6. Step 6: Final answer
    x = 109,495.57

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.