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Finding the Fourth Proportional to 138,967.73, 191,701.36 and 84,536.54

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Solution

The fourth proportional to 138,967.73, 191,701.36 and 84,536.54 is: 116,615.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,967.73 : 191,701.36 = 84,536.54 : x
  2. Step 2: Convert to fraction form
    138,967.73/191,701.36 = 84,536.54/x
  3. Step 3: Cross multiply
    138,967.73x = 191,701.36 × 84,536.54
  4. Step 4: Simplify right side
    138,967.73x = 16,205,769,687.69
  5. Step 5: Solve for x
    x = 16,205,769,687.69/138,967.73
  6. Step 6: Final answer
    x = 116,615.34

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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.