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Finding the Third Proportional to 121,830.19 and 188,278.88

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Solution

The third proportional to 121,830.19 and 188,278.88 is: 290,970.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,830.19 : 188,278.88 = 188,278.88 : x
  2. Step 2: Convert to fraction form
    121,830.19/188,278.88 = 188,278.88/x
  3. Step 3: Cross multiply
    121,830.19x = 188,278.88 × 188,278.88
  4. Step 4: Simplify right side
    121,830.19x = 35,448,934,771.27
  5. Step 5: Solve for x
    x = 35,448,934,771.27/121,830.19
  6. Step 6: Final answer
    x = 290,970.04

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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.