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Finding the Fourth Proportional to 78,771.72, 108,700.69 and 44,775.48

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Solution

The fourth proportional to 78,771.72, 108,700.69 and 44,775.48 is: 61,787.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,771.72 : 108,700.69 = 44,775.48 : x
  2. Step 2: Convert to fraction form
    78,771.72/108,700.69 = 44,775.48/x
  3. Step 3: Cross multiply
    78,771.72x = 108,700.69 × 44,775.48
  4. Step 4: Simplify right side
    78,771.72x = 4,867,125,571.08
  5. Step 5: Solve for x
    x = 4,867,125,571.08/78,771.72
  6. Step 6: Final answer
    x = 61,787.73

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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.