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Finding the Fourth Proportional to 122,711.90, 184,069.55 and 80,859.90

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Solution

The fourth proportional to 122,711.90, 184,069.55 and 80,859.90 is: 121,290.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,711.90 : 184,069.55 = 80,859.90 : x
  2. Step 2: Convert to fraction form
    122,711.90/184,069.55 = 80,859.90/x
  3. Step 3: Cross multiply
    122,711.90x = 184,069.55 × 80,859.90
  4. Step 4: Simplify right side
    122,711.90x = 14,883,845,406.05
  5. Step 5: Solve for x
    x = 14,883,845,406.05/122,711.90
  6. Step 6: Final answer
    x = 121,290.97

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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.