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Finding the Fourth Proportional to 78,138.83, 107,826.26 and 44,148.74

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Solution

The fourth proportional to 78,138.83, 107,826.26 and 44,148.74 is: 60,922.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,138.83 : 107,826.26 = 44,148.74 : x
  2. Step 2: Convert to fraction form
    78,138.83/107,826.26 = 44,148.74/x
  3. Step 3: Cross multiply
    78,138.83x = 107,826.26 × 44,148.74
  4. Step 4: Simplify right side
    78,138.83x = 4,760,393,517.91
  5. Step 5: Solve for x
    x = 4,760,393,517.91/78,138.83
  6. Step 6: Final answer
    x = 60,922.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.