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Finding the Third Proportional to 42,798 and 66,787

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Solution

The third proportional to 42,798 and 66,787 is: 104,222.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,798 : 66,787 = 66,787 : x
  2. Step 2: Convert to fraction form
    42,798/66,787 = 66,787/x
  3. Step 3: Cross multiply
    42,798x = 66,787 × 66,787
  4. Step 4: Simplify right side
    42,798x = 4,460,503,369
  5. Step 5: Solve for x
    x = 4,460,503,369/42,798
  6. Step 6: Final answer
    x = 104,222.24

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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.