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Finding the Fourth Proportional to 81,411.87, 121,907.49 and 56,189.22

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Solution

The fourth proportional to 81,411.87, 121,907.49 and 56,189.22 is: 84,138.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,411.87 : 121,907.49 = 56,189.22 : x
  2. Step 2: Convert to fraction form
    81,411.87/121,907.49 = 56,189.22/x
  3. Step 3: Cross multiply
    81,411.87x = 121,907.49 × 56,189.22
  4. Step 4: Simplify right side
    81,411.87x = 6,849,886,775.26
  5. Step 5: Solve for x
    x = 6,849,886,775.26/81,411.87
  6. Step 6: Final answer
    x = 84,138.67

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