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Finding the Fourth Proportional to 138,395.89, 191,000.44 and 84,716.38

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Solution

The fourth proportional to 138,395.89, 191,000.44 and 84,716.38 is: 116,917.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,395.89 : 191,000.44 = 84,716.38 : x
  2. Step 2: Convert to fraction form
    138,395.89/191,000.44 = 84,716.38/x
  3. Step 3: Cross multiply
    138,395.89x = 191,000.44 × 84,716.38
  4. Step 4: Simplify right side
    138,395.89x = 16,180,866,544.50
  5. Step 5: Solve for x
    x = 16,180,866,544.50/138,395.89
  6. Step 6: Final answer
    x = 116,917.25

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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.