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Finding the Third Proportional to 56,516 and 85,503

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Solution

The third proportional to 56,516 and 85,503 is: 129,357.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,516 : 85,503 = 85,503 : x
  2. Step 2: Convert to fraction form
    56,516/85,503 = 85,503/x
  3. Step 3: Cross multiply
    56,516x = 85,503 × 85,503
  4. Step 4: Simplify right side
    56,516x = 7,310,763,009
  5. Step 5: Solve for x
    x = 7,310,763,009/56,516
  6. Step 6: Final answer
    x = 129,357.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.