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Finding the Fourth Proportional to 139,602.26, 207,824.49 and 138,771.88

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Solution

The fourth proportional to 139,602.26, 207,824.49 and 138,771.88 is: 206,588.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,602.26 : 207,824.49 = 138,771.88 : x
  2. Step 2: Convert to fraction form
    139,602.26/207,824.49 = 138,771.88/x
  3. Step 3: Cross multiply
    139,602.26x = 207,824.49 × 138,771.88
  4. Step 4: Simplify right side
    139,602.26x = 28,840,194,667.78
  5. Step 5: Solve for x
    x = 28,840,194,667.78/139,602.26
  6. Step 6: Final answer
    x = 206,588.30

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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.