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Finding the Fourth Proportional to 139,371.40, 208,003.87 and 125,919.32

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Solution

The fourth proportional to 139,371.40, 208,003.87 and 125,919.32 is: 187,927.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,371.40 : 208,003.87 = 125,919.32 : x
  2. Step 2: Convert to fraction form
    139,371.40/208,003.87 = 125,919.32/x
  3. Step 3: Cross multiply
    139,371.40x = 208,003.87 × 125,919.32
  4. Step 4: Simplify right side
    139,371.40x = 26,191,705,867.77
  5. Step 5: Solve for x
    x = 26,191,705,867.77/139,371.40
  6. Step 6: Final answer
    x = 187,927.41

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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.