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Finding the Fourth Proportional to 139,678.29, 192,750.30 and 76,016.34

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Solution

The fourth proportional to 139,678.29, 192,750.30 and 76,016.34 is: 104,899.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,678.29 : 192,750.30 = 76,016.34 : x
  2. Step 2: Convert to fraction form
    139,678.29/192,750.30 = 76,016.34/x
  3. Step 3: Cross multiply
    139,678.29x = 192,750.30 × 76,016.34
  4. Step 4: Simplify right side
    139,678.29x = 14,652,172,339.90
  5. Step 5: Solve for x
    x = 14,652,172,339.90/139,678.29
  6. Step 6: Final answer
    x = 104,899.43

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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.