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Finding the Fourth Proportional to 78,378.37, 108,168.83 and 44,392.80

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Solution

The fourth proportional to 78,378.37, 108,168.83 and 44,392.80 is: 61,265.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,378.37 : 108,168.83 = 44,392.80 : x
  2. Step 2: Convert to fraction form
    78,378.37/108,168.83 = 44,392.80/x
  3. Step 3: Cross multiply
    78,378.37x = 108,168.83 × 44,392.80
  4. Step 4: Simplify right side
    78,378.37x = 4,801,917,236.42
  5. Step 5: Solve for x
    x = 4,801,917,236.42/78,378.37
  6. Step 6: Final answer
    x = 61,265.85

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1.5x scale

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.