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Finding the Fourth Proportional to 307,571.80, 461,472.90 and 120,717.40

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Solution

The fourth proportional to 307,571.80, 461,472.90 and 120,717.40 is: 181,121.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,571.80 : 461,472.90 = 120,717.40 : x
  2. Step 2: Convert to fraction form
    307,571.80/461,472.90 = 120,717.40/x
  3. Step 3: Cross multiply
    307,571.80x = 461,472.90 × 120,717.40
  4. Step 4: Simplify right side
    307,571.80x = 55,707,808,658.46
  5. Step 5: Solve for x
    x = 55,707,808,658.46/307,571.80
  6. Step 6: Final answer
    x = 181,121.31

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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.