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Finding the Fourth Proportional to 257,996.47, 386,845.71 and 100,040.39

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Solution

The fourth proportional to 257,996.47, 386,845.71 and 100,040.39 is: 150,002.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,996.47 : 386,845.71 = 100,040.39 : x
  2. Step 2: Convert to fraction form
    257,996.47/386,845.71 = 100,040.39/x
  3. Step 3: Cross multiply
    257,996.47x = 386,845.71 × 100,040.39
  4. Step 4: Simplify right side
    257,996.47x = 38,700,195,698.23
  5. Step 5: Solve for x
    x = 38,700,195,698.23/257,996.47
  6. Step 6: Final answer
    x = 150,002.81

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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.