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Finding the Third Proportional to 64,431 and 139,557

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Solution

The third proportional to 64,431 and 139,557 is: 302,279.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,431 : 139,557 = 139,557 : x
  2. Step 2: Convert to fraction form
    64,431/139,557 = 139,557/x
  3. Step 3: Cross multiply
    64,431x = 139,557 × 139,557
  4. Step 4: Simplify right side
    64,431x = 19,476,156,249
  5. Step 5: Solve for x
    x = 19,476,156,249/64,431
  6. Step 6: Final answer
    x = 302,279.28

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.