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Finding the Fourth Proportional to 139,245.42, 208,857.75 and 44,485.61

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Solution

The fourth proportional to 139,245.42, 208,857.75 and 44,485.61 is: 66,725.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,245.42 : 208,857.75 = 44,485.61 : x
  2. Step 2: Convert to fraction form
    139,245.42/208,857.75 = 44,485.61/x
  3. Step 3: Cross multiply
    139,245.42x = 208,857.75 × 44,485.61
  4. Step 4: Simplify right side
    139,245.42x = 9,291,164,483.45
  5. Step 5: Solve for x
    x = 9,291,164,483.45/139,245.42
  6. Step 6: Final answer
    x = 66,725.10

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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.