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Finding the Fourth Proportional to 307,053.81, 423,727.88 and 171,087.21

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Solution

The fourth proportional to 307,053.81, 423,727.88 and 171,087.21 is: 236,096.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,053.81 : 423,727.88 = 171,087.21 : x
  2. Step 2: Convert to fraction form
    307,053.81/423,727.88 = 171,087.21/x
  3. Step 3: Cross multiply
    307,053.81x = 423,727.88 × 171,087.21
  4. Step 4: Simplify right side
    307,053.81x = 72,494,419,932.98
  5. Step 5: Solve for x
    x = 72,494,419,932.98/307,053.81
  6. Step 6: Final answer
    x = 236,096.79

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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.