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Finding the Fourth Proportional to 138,930.28, 191,767.44 and 88,629.28

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Solution

The fourth proportional to 138,930.28, 191,767.44 and 88,629.28 is: 122,336.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,930.28 : 191,767.44 = 88,629.28 : x
  2. Step 2: Convert to fraction form
    138,930.28/191,767.44 = 88,629.28/x
  3. Step 3: Cross multiply
    138,930.28x = 191,767.44 × 88,629.28
  4. Step 4: Simplify right side
    138,930.28x = 16,996,210,134.64
  5. Step 5: Solve for x
    x = 16,996,210,134.64/138,930.28
  6. Step 6: Final answer
    x = 122,336.25

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Why These Related Problems?

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