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Finding the Fourth Proportional to 139,860.32, 209,790.41 and 34,679.29

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Solution

The fourth proportional to 139,860.32, 209,790.41 and 34,679.29 is: 52,018.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,860.32 : 209,790.41 = 34,679.29 : x
  2. Step 2: Convert to fraction form
    139,860.32/209,790.41 = 34,679.29/x
  3. Step 3: Cross multiply
    139,860.32x = 209,790.41 × 34,679.29
  4. Step 4: Simplify right side
    139,860.32x = 7,275,382,163.09
  5. Step 5: Solve for x
    x = 7,275,382,163.09/139,860.32
  6. Step 6: Final answer
    x = 52,018.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.