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Finding the Third Proportional to 51,210 and 79,480

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Solution

The third proportional to 51,210 and 79,480 is: 123,356.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,210 : 79,480 = 79,480 : x
  2. Step 2: Convert to fraction form
    51,210/79,480 = 79,480/x
  3. Step 3: Cross multiply
    51,210x = 79,480 × 79,480
  4. Step 4: Simplify right side
    51,210x = 6,317,070,400
  5. Step 5: Solve for x
    x = 6,317,070,400/51,210
  6. Step 6: Final answer
    x = 123,356.19

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.