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Finding the Third Proportional to 128,543 and 197,702

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Solution

The third proportional to 128,543 and 197,702 is: 304,070.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,543 : 197,702 = 197,702 : x
  2. Step 2: Convert to fraction form
    128,543/197,702 = 197,702/x
  3. Step 3: Cross multiply
    128,543x = 197,702 × 197,702
  4. Step 4: Simplify right side
    128,543x = 39,086,080,804
  5. Step 5: Solve for x
    x = 39,086,080,804/128,543
  6. Step 6: Final answer
    x = 304,070.08

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.