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Finding the Third Proportional to 128,752 and 198,959

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Solution

The third proportional to 128,752 and 198,959 is: 307,449.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,752 : 198,959 = 198,959 : x
  2. Step 2: Convert to fraction form
    128,752/198,959 = 198,959/x
  3. Step 3: Cross multiply
    128,752x = 198,959 × 198,959
  4. Step 4: Simplify right side
    128,752x = 39,584,683,681
  5. Step 5: Solve for x
    x = 39,584,683,681/128,752
  6. Step 6: Final answer
    x = 307,449.08

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.