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Finding the Fourth Proportional to 139,146.45, 208,736.28 and 44,343.78

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Solution

The fourth proportional to 139,146.45, 208,736.28 and 44,343.78 is: 66,520.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,146.45 : 208,736.28 = 44,343.78 : x
  2. Step 2: Convert to fraction form
    139,146.45/208,736.28 = 44,343.78/x
  3. Step 3: Cross multiply
    139,146.45x = 208,736.28 × 44,343.78
  4. Step 4: Simplify right side
    139,146.45x = 9,256,155,678.34
  5. Step 5: Solve for x
    x = 9,256,155,678.34/139,146.45
  6. Step 6: Final answer
    x = 66,520.96

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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.