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Finding the Fourth Proportional to 74,362.51, 111,535.61 and 21,772.51

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Solution

The fourth proportional to 74,362.51, 111,535.61 and 21,772.51 is: 32,656.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,362.51 : 111,535.61 = 21,772.51 : x
  2. Step 2: Convert to fraction form
    74,362.51/111,535.61 = 21,772.51/x
  3. Step 3: Cross multiply
    74,362.51x = 111,535.61 × 21,772.51
  4. Step 4: Simplify right side
    74,362.51x = 2,428,410,075.22
  5. Step 5: Solve for x
    x = 2,428,410,075.22/74,362.51
  6. Step 6: Final answer
    x = 32,656.38

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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.