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Finding the Fourth Proportional to 76,187.17, 114,279.54 and 20,783.17

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Solution

The fourth proportional to 76,187.17, 114,279.54 and 20,783.17 is: 31,174.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,187.17 : 114,279.54 = 20,783.17 : x
  2. Step 2: Convert to fraction form
    76,187.17/114,279.54 = 20,783.17/x
  3. Step 3: Cross multiply
    76,187.17x = 114,279.54 × 20,783.17
  4. Step 4: Simplify right side
    76,187.17x = 2,375,091,107.34
  5. Step 5: Solve for x
    x = 2,375,091,107.34/76,187.17
  6. Step 6: Final answer
    x = 31,174.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.