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Finding the Fourth Proportional to 481,124.97, 721,690.47 and 126,135.81

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Solution

The fourth proportional to 481,124.97, 721,690.47 and 126,135.81 is: 189,204.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,124.97 : 721,690.47 = 126,135.81 : x
  2. Step 2: Convert to fraction form
    481,124.97/721,690.47 = 126,135.81/x
  3. Step 3: Cross multiply
    481,124.97x = 721,690.47 × 126,135.81
  4. Step 4: Simplify right side
    481,124.97x = 91,031,012,002.73
  5. Step 5: Solve for x
    x = 91,031,012,002.73/481,124.97
  6. Step 6: Final answer
    x = 189,204.51

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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.