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Finding the Fourth Proportional to 104,335.34, 143,825.78 and 81,634.91

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Solution

The fourth proportional to 104,335.34, 143,825.78 and 81,634.91 is: 112,533.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,335.34 : 143,825.78 = 81,634.91 : x
  2. Step 2: Convert to fraction form
    104,335.34/143,825.78 = 81,634.91/x
  3. Step 3: Cross multiply
    104,335.34x = 143,825.78 × 81,634.91
  4. Step 4: Simplify right side
    104,335.34x = 11,741,203,631.74
  5. Step 5: Solve for x
    x = 11,741,203,631.74/104,335.34
  6. Step 6: Final answer
    x = 112,533.33

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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.