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Finding the Fourth Proportional to 139,282.10, 192,209.29 and 75,619.90

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Solution

The fourth proportional to 139,282.10, 192,209.29 and 75,619.90 is: 104,355.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,282.10 : 192,209.29 = 75,619.90 : x
  2. Step 2: Convert to fraction form
    139,282.10/192,209.29 = 75,619.90/x
  3. Step 3: Cross multiply
    139,282.10x = 192,209.29 × 75,619.90
  4. Step 4: Simplify right side
    139,282.10x = 14,534,846,619.30
  5. Step 5: Solve for x
    x = 14,534,846,619.30/139,282.10
  6. Step 6: Final answer
    x = 104,355.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.