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Finding the Third Proportional to 52,990 and 74,270

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Solution

The third proportional to 52,990 and 74,270 is: 104,095.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,990 : 74,270 = 74,270 : x
  2. Step 2: Convert to fraction form
    52,990/74,270 = 74,270/x
  3. Step 3: Cross multiply
    52,990x = 74,270 × 74,270
  4. Step 4: Simplify right side
    52,990x = 5,516,032,900
  5. Step 5: Solve for x
    x = 5,516,032,900/52,990
  6. Step 6: Final answer
    x = 104,095.73

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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.