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Finding the Fourth Proportional to 139,989.96, 193,181.94 and 76,329

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Solution

The fourth proportional to 139,989.96, 193,181.94 and 76,329 is: 105,331.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,989.96 : 193,181.94 = 76,329 : x
  2. Step 2: Convert to fraction form
    139,989.96/193,181.94 = 76,329/x
  3. Step 3: Cross multiply
    139,989.96x = 193,181.94 × 76,329
  4. Step 4: Simplify right side
    139,989.96x = 14,745,384,298.26
  5. Step 5: Solve for x
    x = 14,745,384,298.26/139,989.96
  6. Step 6: Final answer
    x = 105,331.73

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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.