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Finding the Fourth Proportional to 138,708.64, 208,094.20 and 43,944.56

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Solution

The fourth proportional to 138,708.64, 208,094.20 and 43,944.56 is: 65,926.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,708.64 : 208,094.20 = 43,944.56 : x
  2. Step 2: Convert to fraction form
    138,708.64/208,094.20 = 43,944.56/x
  3. Step 3: Cross multiply
    138,708.64x = 208,094.20 × 43,944.56
  4. Step 4: Simplify right side
    138,708.64x = 9,144,608,057.55
  5. Step 5: Solve for x
    x = 9,144,608,057.55/138,708.64
  6. Step 6: Final answer
    x = 65,926.74

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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.