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Finding the Fourth Proportional to 84,405.51, 126,394.01 and 50,650.31

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Solution

The fourth proportional to 84,405.51, 126,394.01 and 50,650.31 is: 75,846.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,405.51 : 126,394.01 = 50,650.31 : x
  2. Step 2: Convert to fraction form
    84,405.51/126,394.01 = 50,650.31/x
  3. Step 3: Cross multiply
    84,405.51x = 126,394.01 × 50,650.31
  4. Step 4: Simplify right side
    84,405.51x = 6,401,894,903.42
  5. Step 5: Solve for x
    x = 6,401,894,903.42/84,405.51
  6. Step 6: Final answer
    x = 75,846.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.