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Finding the Fourth Proportional to 139,004.86, 208,428.30 and 54,719.38

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Solution

The fourth proportional to 139,004.86, 208,428.30 and 54,719.38 is: 82,047.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,004.86 : 208,428.30 = 54,719.38 : x
  2. Step 2: Convert to fraction form
    139,004.86/208,428.30 = 54,719.38/x
  3. Step 3: Cross multiply
    139,004.86x = 208,428.30 × 54,719.38
  4. Step 4: Simplify right side
    139,004.86x = 11,405,067,350.45
  5. Step 5: Solve for x
    x = 11,405,067,350.45/139,004.86
  6. Step 6: Final answer
    x = 82,047.98

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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.