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Finding the Fourth Proportional to 122,715.90, 184,075.55 and 80,863.90

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Solution

The fourth proportional to 122,715.90, 184,075.55 and 80,863.90 is: 121,296.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,715.90 : 184,075.55 = 80,863.90 : x
  2. Step 2: Convert to fraction form
    122,715.90/184,075.55 = 80,863.90/x
  3. Step 3: Cross multiply
    122,715.90x = 184,075.55 × 80,863.90
  4. Step 4: Simplify right side
    122,715.90x = 14,885,066,867.65
  5. Step 5: Solve for x
    x = 14,885,066,867.65/122,715.90
  6. Step 6: Final answer
    x = 121,296.97

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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.