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Finding the Fourth Proportional to 122,978.30, 184,467.45 and 60,640.70

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Solution

The fourth proportional to 122,978.30, 184,467.45 and 60,640.70 is: 90,961.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,978.30 : 184,467.45 = 60,640.70 : x
  2. Step 2: Convert to fraction form
    122,978.30/184,467.45 = 60,640.70/x
  3. Step 3: Cross multiply
    122,978.30x = 184,467.45 × 60,640.70
  4. Step 4: Simplify right side
    122,978.30x = 11,186,235,295.22
  5. Step 5: Solve for x
    x = 11,186,235,295.22/122,978.30
  6. Step 6: Final answer
    x = 90,961.05

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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.