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Finding the Fourth Proportional to 139,736.80, 209,586.30 and 55,558.90

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Solution

The fourth proportional to 139,736.80, 209,586.30 and 55,558.90 is: 83,330.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,736.80 : 209,586.30 = 55,558.90 : x
  2. Step 2: Convert to fraction form
    139,736.80/209,586.30 = 55,558.90/x
  3. Step 3: Cross multiply
    139,736.80x = 209,586.30 × 55,558.90
  4. Step 4: Simplify right side
    139,736.80x = 11,644,384,283.07
  5. Step 5: Solve for x
    x = 11,644,384,283.07/139,736.80
  6. Step 6: Final answer
    x = 83,330.84

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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.