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Finding the Fourth Proportional to 79,021.80, 109,049.32 and 43,211.44

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Solution

The fourth proportional to 79,021.80, 109,049.32 and 43,211.44 is: 59,631.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,021.80 : 109,049.32 = 43,211.44 : x
  2. Step 2: Convert to fraction form
    79,021.80/109,049.32 = 43,211.44/x
  3. Step 3: Cross multiply
    79,021.80x = 109,049.32 × 43,211.44
  4. Step 4: Simplify right side
    79,021.80x = 4,712,178,148.22
  5. Step 5: Solve for x
    x = 4,712,178,148.22/79,021.80
  6. Step 6: Final answer
    x = 59,631.37

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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.