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Finding the Fourth Proportional to 141,879.09, 212,881.32 and 74,395.01

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Solution

The fourth proportional to 141,879.09, 212,881.32 and 74,395.01 is: 111,625.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,879.09 : 212,881.32 = 74,395.01 : x
  2. Step 2: Convert to fraction form
    141,879.09/212,881.32 = 74,395.01/x
  3. Step 3: Cross multiply
    141,879.09x = 212,881.32 × 74,395.01
  4. Step 4: Simplify right side
    141,879.09x = 15,837,306,865.81
  5. Step 5: Solve for x
    x = 15,837,306,865.81/141,879.09
  6. Step 6: Final answer
    x = 111,625.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.