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Finding the Third Proportional to 81,656.44 and 128,317.50

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Solution

The third proportional to 81,656.44 and 128,317.50 is: 201,642.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656.44 : 128,317.50 = 128,317.50 : x
  2. Step 2: Convert to fraction form
    81,656.44/128,317.50 = 128,317.50/x
  3. Step 3: Cross multiply
    81,656.44x = 128,317.50 × 128,317.50
  4. Step 4: Simplify right side
    81,656.44x = 16,465,380,806.25
  5. Step 5: Solve for x
    x = 16,465,380,806.25/81,656.44
  6. Step 6: Final answer
    x = 201,642.16

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.