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Finding the Third Proportional to 89,615 and 121,779

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Solution

The third proportional to 89,615 and 121,779 is: 165,487.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,615 : 121,779 = 121,779 : x
  2. Step 2: Convert to fraction form
    89,615/121,779 = 121,779/x
  3. Step 3: Cross multiply
    89,615x = 121,779 × 121,779
  4. Step 4: Simplify right side
    89,615x = 14,830,124,841
  5. Step 5: Solve for x
    x = 14,830,124,841/89,615
  6. Step 6: Final answer
    x = 165,487.08

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.