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Finding the Third Proportional to 70,389 and 91,368

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Solution

The third proportional to 70,389 and 91,368 is: 118,599.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,389 : 91,368 = 91,368 : x
  2. Step 2: Convert to fraction form
    70,389/91,368 = 91,368/x
  3. Step 3: Cross multiply
    70,389x = 91,368 × 91,368
  4. Step 4: Simplify right side
    70,389x = 8,348,111,424
  5. Step 5: Solve for x
    x = 8,348,111,424/70,389
  6. Step 6: Final answer
    x = 118,599.66

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.