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Finding the Fourth Proportional to 139,662, 192,731.04 and 75,998.88

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Solution

The fourth proportional to 139,662, 192,731.04 and 75,998.88 is: 104,877.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,662 : 192,731.04 = 75,998.88 : x
  2. Step 2: Convert to fraction form
    139,662/192,731.04 = 75,998.88/x
  3. Step 3: Cross multiply
    139,662x = 192,731.04 × 75,998.88
  4. Step 4: Simplify right side
    139,662x = 14,647,343,181.24
  5. Step 5: Solve for x
    x = 14,647,343,181.24/139,662
  6. Step 6: Final answer
    x = 104,877.08

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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.