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Finding the Fourth Proportional to 71,376.40, 107,056.31 and 18,789.98

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Solution

The fourth proportional to 71,376.40, 107,056.31 and 18,789.98 is: 28,182.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,376.40 : 107,056.31 = 18,789.98 : x
  2. Step 2: Convert to fraction form
    71,376.40/107,056.31 = 18,789.98/x
  3. Step 3: Cross multiply
    71,376.40x = 107,056.31 × 18,789.98
  4. Step 4: Simplify right side
    71,376.40x = 2,011,586,238.39
  5. Step 5: Solve for x
    x = 2,011,586,238.39/71,376.40
  6. Step 6: Final answer
    x = 28,182.79

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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.