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Finding the Fourth Proportional to 60,709.82, 91,009.26 and 21,245.41

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Solution

The fourth proportional to 60,709.82, 91,009.26 and 21,245.41 is: 31,848.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,709.82 : 91,009.26 = 21,245.41 : x
  2. Step 2: Convert to fraction form
    60,709.82/91,009.26 = 21,245.41/x
  3. Step 3: Cross multiply
    60,709.82x = 91,009.26 × 21,245.41
  4. Step 4: Simplify right side
    60,709.82x = 1,933,529,042.50
  5. Step 5: Solve for x
    x = 1,933,529,042.50/60,709.82
  6. Step 6: Final answer
    x = 31,848.70

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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.