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Finding the Fourth Proportional to 139,628.39, 207,863.26 and 138,798.01

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Solution

The fourth proportional to 139,628.39, 207,863.26 and 138,798.01 is: 206,627.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,628.39 : 207,863.26 = 138,798.01 : x
  2. Step 2: Convert to fraction form
    139,628.39/207,863.26 = 138,798.01/x
  3. Step 3: Cross multiply
    139,628.39x = 207,863.26 × 138,798.01
  4. Step 4: Simplify right side
    139,628.39x = 28,851,005,800.80
  5. Step 5: Solve for x
    x = 28,851,005,800.80/139,628.39
  6. Step 6: Final answer
    x = 206,627.07

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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.