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Finding the Fourth Proportional to 139,615.94, 207,844.82 and 138,785.58

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Solution

The fourth proportional to 139,615.94, 207,844.82 and 138,785.58 is: 206,608.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,615.94 : 207,844.82 = 138,785.58 : x
  2. Step 2: Convert to fraction form
    139,615.94/207,844.82 = 138,785.58/x
  3. Step 3: Cross multiply
    139,615.94x = 207,844.82 × 138,785.58
  4. Step 4: Simplify right side
    139,615.94x = 28,845,863,893.70
  5. Step 5: Solve for x
    x = 28,845,863,893.70/139,615.94
  6. Step 6: Final answer
    x = 206,608.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.