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Finding the Third Proportional to 163,155 and 252,129

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Solution

The third proportional to 163,155 and 252,129 is: 389,623.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,155 : 252,129 = 252,129 : x
  2. Step 2: Convert to fraction form
    163,155/252,129 = 252,129/x
  3. Step 3: Cross multiply
    163,155x = 252,129 × 252,129
  4. Step 4: Simplify right side
    163,155x = 63,569,032,641
  5. Step 5: Solve for x
    x = 63,569,032,641/163,155
  6. Step 6: Final answer
    x = 389,623.56

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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.