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Finding the Third Proportional to 121,871.25 and 188,338.50

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Solution

The third proportional to 121,871.25 and 188,338.50 is: 291,056.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,871.25 : 188,338.50 = 188,338.50 : x
  2. Step 2: Convert to fraction form
    121,871.25/188,338.50 = 188,338.50/x
  3. Step 3: Cross multiply
    121,871.25x = 188,338.50 × 188,338.50
  4. Step 4: Simplify right side
    121,871.25x = 35,471,390,582.25
  5. Step 5: Solve for x
    x = 35,471,390,582.25/121,871.25
  6. Step 6: Final answer
    x = 291,056.26

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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.