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Finding the Third Proportional to 120,389.63 and 178,851.38

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Solution

The third proportional to 120,389.63 and 178,851.38 is: 265,702.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,389.63 : 178,851.38 = 178,851.38 : x
  2. Step 2: Convert to fraction form
    120,389.63/178,851.38 = 178,851.38/x
  3. Step 3: Cross multiply
    120,389.63x = 178,851.38 × 178,851.38
  4. Step 4: Simplify right side
    120,389.63x = 31,987,814,339.39
  5. Step 5: Solve for x
    x = 31,987,814,339.39/120,389.63
  6. Step 6: Final answer
    x = 265,702.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.