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Finding the Fourth Proportional to 139,858.27, 193,215.32 and 112,954.08

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Solution

The fourth proportional to 139,858.27, 193,215.32 and 112,954.08 is: 156,046.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,858.27 : 193,215.32 = 112,954.08 : x
  2. Step 2: Convert to fraction form
    139,858.27/193,215.32 = 112,954.08/x
  3. Step 3: Cross multiply
    139,858.27x = 193,215.32 × 112,954.08
  4. Step 4: Simplify right side
    139,858.27x = 21,824,458,712.51
  5. Step 5: Solve for x
    x = 21,824,458,712.51/139,858.27
  6. Step 6: Final answer
    x = 156,046.97

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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.