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Finding the Fourth Proportional to 78,885.37, 108,778.91 and 51,993.44

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Solution

The fourth proportional to 78,885.37, 108,778.91 and 51,993.44 is: 71,696.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,885.37 : 108,778.91 = 51,993.44 : x
  2. Step 2: Convert to fraction form
    78,885.37/108,778.91 = 51,993.44/x
  3. Step 3: Cross multiply
    78,885.37x = 108,778.91 × 51,993.44
  4. Step 4: Simplify right side
    78,885.37x = 5,655,789,730.35
  5. Step 5: Solve for x
    x = 5,655,789,730.35/78,885.37
  6. Step 6: Final answer
    x = 71,696.31

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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.