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Finding the Third Proportional to 121,890 and 179,310

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Solution

The third proportional to 121,890 and 179,310 is: 263,779.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,890 : 179,310 = 179,310 : x
  2. Step 2: Convert to fraction form
    121,890/179,310 = 179,310/x
  3. Step 3: Cross multiply
    121,890x = 179,310 × 179,310
  4. Step 4: Simplify right side
    121,890x = 32,152,076,100
  5. Step 5: Solve for x
    x = 32,152,076,100/121,890
  6. Step 6: Final answer
    x = 263,779.44

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.