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Finding the Fourth Proportional to 139,655.30, 192,729.12 and 75,995.42

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Solution

The fourth proportional to 139,655.30, 192,729.12 and 75,995.42 is: 104,876.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,655.30 : 192,729.12 = 75,995.42 : x
  2. Step 2: Convert to fraction form
    139,655.30/192,729.12 = 75,995.42/x
  3. Step 3: Cross multiply
    139,655.30x = 192,729.12 × 75,995.42
  4. Step 4: Simplify right side
    139,655.30x = 14,646,530,420.63
  5. Step 5: Solve for x
    x = 14,646,530,420.63/139,655.30
  6. Step 6: Final answer
    x = 104,876.29

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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.