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Finding the Fourth Proportional to 139,145.85, 192,016.08 and 75,482.28

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Solution

The fourth proportional to 139,145.85, 192,016.08 and 75,482.28 is: 104,162.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,145.85 : 192,016.08 = 75,482.28 : x
  2. Step 2: Convert to fraction form
    139,145.85/192,016.08 = 75,482.28/x
  3. Step 3: Cross multiply
    139,145.85x = 192,016.08 × 75,482.28
  4. Step 4: Simplify right side
    139,145.85x = 14,493,811,515.06
  5. Step 5: Solve for x
    x = 14,493,811,515.06/139,145.85
  6. Step 6: Final answer
    x = 104,162.73

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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.