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Finding the Fourth Proportional to 139,029.41, 208,555.05 and 54,783.74

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Solution

The fourth proportional to 139,029.41, 208,555.05 and 54,783.74 is: 82,179.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,029.41 : 208,555.05 = 54,783.74 : x
  2. Step 2: Convert to fraction form
    139,029.41/208,555.05 = 54,783.74/x
  3. Step 3: Cross multiply
    139,029.41x = 208,555.05 × 54,783.74
  4. Step 4: Simplify right side
    139,029.41x = 11,425,425,634.89
  5. Step 5: Solve for x
    x = 11,425,425,634.89/139,029.41
  6. Step 6: Final answer
    x = 82,179.92

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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.