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Finding the Fourth Proportional to 78,519.84, 108,392.76 and 51,676.44

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Solution

The fourth proportional to 78,519.84, 108,392.76 and 51,676.44 is: 71,336.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,519.84 : 108,392.76 = 51,676.44 : x
  2. Step 2: Convert to fraction form
    78,519.84/108,392.76 = 51,676.44/x
  3. Step 3: Cross multiply
    78,519.84x = 108,392.76 × 51,676.44
  4. Step 4: Simplify right side
    78,519.84x = 5,601,351,958.57
  5. Step 5: Solve for x
    x = 5,601,351,958.57/78,519.84
  6. Step 6: Final answer
    x = 71,336.77

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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.