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Finding the Fourth Proportional to 139,785.06, 192,896.82 and 79,347.72

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Solution

The fourth proportional to 139,785.06, 192,896.82 and 79,347.72 is: 109,496.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,785.06 : 192,896.82 = 79,347.72 : x
  2. Step 2: Convert to fraction form
    139,785.06/192,896.82 = 79,347.72/x
  3. Step 3: Cross multiply
    139,785.06x = 192,896.82 × 79,347.72
  4. Step 4: Simplify right side
    139,785.06x = 15,305,922,862.25
  5. Step 5: Solve for x
    x = 15,305,922,862.25/139,785.06
  6. Step 6: Final answer
    x = 109,496.13

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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.