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Finding the Fourth Proportional to 139,302.28, 208,835.37 and 55,121.84

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Solution

The fourth proportional to 139,302.28, 208,835.37 and 55,121.84 is: 82,636.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,302.28 : 208,835.37 = 55,121.84 : x
  2. Step 2: Convert to fraction form
    139,302.28/208,835.37 = 55,121.84/x
  3. Step 3: Cross multiply
    139,302.28x = 208,835.37 × 55,121.84
  4. Step 4: Simplify right side
    139,302.28x = 11,511,389,851.48
  5. Step 5: Solve for x
    x = 11,511,389,851.48/139,302.28
  6. Step 6: Final answer
    x = 82,636.05

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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.