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Finding the Fourth Proportional to 388,108.42, 582,187.20 and 121,879.42

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Solution

The fourth proportional to 388,108.42, 582,187.20 and 121,879.42 is: 182,826.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,108.42 : 582,187.20 = 121,879.42 : x
  2. Step 2: Convert to fraction form
    388,108.42/582,187.20 = 121,879.42/x
  3. Step 3: Cross multiply
    388,108.42x = 582,187.20 × 121,879.42
  4. Step 4: Simplify right side
    388,108.42x = 70,956,638,267.42
  5. Step 5: Solve for x
    x = 70,956,638,267.42/388,108.42
  6. Step 6: Final answer
    x = 182,826.85

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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.