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Finding the Fourth Proportional to 100,343.64, 138,475.78 and 55,025.76

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Solution

The fourth proportional to 100,343.64, 138,475.78 and 55,025.76 is: 75,936.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,343.64 : 138,475.78 = 55,025.76 : x
  2. Step 2: Convert to fraction form
    100,343.64/138,475.78 = 55,025.76/x
  3. Step 3: Cross multiply
    100,343.64x = 138,475.78 × 55,025.76
  4. Step 4: Simplify right side
    100,343.64x = 7,619,735,036.09
  5. Step 5: Solve for x
    x = 7,619,735,036.09/100,343.64
  6. Step 6: Final answer
    x = 75,936.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.