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Finding the Fourth Proportional to 84,246.56, 126,369.78 and 21,917.06

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Solution

The fourth proportional to 84,246.56, 126,369.78 and 21,917.06 is: 32,875.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,246.56 : 126,369.78 = 21,917.06 : x
  2. Step 2: Convert to fraction form
    84,246.56/126,369.78 = 21,917.06/x
  3. Step 3: Cross multiply
    84,246.56x = 126,369.78 × 21,917.06
  4. Step 4: Simplify right side
    84,246.56x = 2,769,654,050.45
  5. Step 5: Solve for x
    x = 2,769,654,050.45/84,246.56
  6. Step 6: Final answer
    x = 32,875.57

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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.