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Finding the Third Proportional to 61,418 and 129,358

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Solution

The third proportional to 61,418 and 129,358 is: 272,452.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,418 : 129,358 = 129,358 : x
  2. Step 2: Convert to fraction form
    61,418/129,358 = 129,358/x
  3. Step 3: Cross multiply
    61,418x = 129,358 × 129,358
  4. Step 4: Simplify right side
    61,418x = 16,733,492,164
  5. Step 5: Solve for x
    x = 16,733,492,164/61,418
  6. Step 6: Final answer
    x = 272,452.57

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.