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Finding the Third Proportional to 128,430 and 170,460

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Solution

The third proportional to 128,430 and 170,460 is: 226,244.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,430 : 170,460 = 170,460 : x
  2. Step 2: Convert to fraction form
    128,430/170,460 = 170,460/x
  3. Step 3: Cross multiply
    128,430x = 170,460 × 170,460
  4. Step 4: Simplify right side
    128,430x = 29,056,611,600
  5. Step 5: Solve for x
    x = 29,056,611,600/128,430
  6. Step 6: Final answer
    x = 226,244.74

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.