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Finding the Third Proportional to 74,431 and 101,072

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Solution

The third proportional to 74,431 and 101,072 is: 137,248.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,431 : 101,072 = 101,072 : x
  2. Step 2: Convert to fraction form
    74,431/101,072 = 101,072/x
  3. Step 3: Cross multiply
    74,431x = 101,072 × 101,072
  4. Step 4: Simplify right side
    74,431x = 10,215,549,184
  5. Step 5: Solve for x
    x = 10,215,549,184/74,431
  6. Step 6: Final answer
    x = 137,248.58

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.