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Finding the Fourth Proportional to 117,171.70, 161,698.51 and 65,486.51

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Solution

The fourth proportional to 117,171.70, 161,698.51 and 65,486.51 is: 90,372.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,171.70 : 161,698.51 = 65,486.51 : x
  2. Step 2: Convert to fraction form
    117,171.70/161,698.51 = 65,486.51/x
  3. Step 3: Cross multiply
    117,171.70x = 161,698.51 × 65,486.51
  4. Step 4: Simplify right side
    117,171.70x = 10,589,070,971.84
  5. Step 5: Solve for x
    x = 10,589,070,971.84/117,171.70
  6. Step 6: Final answer
    x = 90,372.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.