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Finding the Fourth Proportional to 343,973.72, 516,163.56 and 130,920.98

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Solution

The fourth proportional to 343,973.72, 516,163.56 and 130,920.98 is: 196,458.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,973.72 : 516,163.56 = 130,920.98 : x
  2. Step 2: Convert to fraction form
    343,973.72/516,163.56 = 130,920.98/x
  3. Step 3: Cross multiply
    343,973.72x = 516,163.56 × 130,920.98
  4. Step 4: Simplify right side
    343,973.72x = 67,576,639,115.49
  5. Step 5: Solve for x
    x = 67,576,639,115.49/343,973.72
  6. Step 6: Final answer
    x = 196,458.73

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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.