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Finding the Fourth Proportional to 79,474.85, 109,674.84 and 43,176

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Solution

The fourth proportional to 79,474.85, 109,674.84 and 43,176 is: 59,582.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,474.85 : 109,674.84 = 43,176 : x
  2. Step 2: Convert to fraction form
    79,474.85/109,674.84 = 43,176/x
  3. Step 3: Cross multiply
    79,474.85x = 109,674.84 × 43,176
  4. Step 4: Simplify right side
    79,474.85x = 4,735,320,891.84
  5. Step 5: Solve for x
    x = 4,735,320,891.84/79,474.85
  6. Step 6: Final answer
    x = 59,582.64

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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.