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Finding the Fourth Proportional to 122,807.90, 184,211.85 and 91,703.90

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Solution

The fourth proportional to 122,807.90, 184,211.85 and 91,703.90 is: 137,555.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,807.90 : 184,211.85 = 91,703.90 : x
  2. Step 2: Convert to fraction form
    122,807.90/184,211.85 = 91,703.90/x
  3. Step 3: Cross multiply
    122,807.90x = 184,211.85 × 91,703.90
  4. Step 4: Simplify right side
    122,807.90x = 16,892,945,071.22
  5. Step 5: Solve for x
    x = 16,892,945,071.22/122,807.90
  6. Step 6: Final answer
    x = 137,555.85

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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.