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Finding the Fourth Proportional to 71,359.56, 107,011.70 and 21,427.88

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Solution

The fourth proportional to 71,359.56, 107,011.70 and 21,427.88 is: 32,133.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,359.56 : 107,011.70 = 21,427.88 : x
  2. Step 2: Convert to fraction form
    71,359.56/107,011.70 = 21,427.88/x
  3. Step 3: Cross multiply
    71,359.56x = 107,011.70 × 21,427.88
  4. Step 4: Simplify right side
    71,359.56x = 2,293,033,866.20
  5. Step 5: Solve for x
    x = 2,293,033,866.20/71,359.56
  6. Step 6: Final answer
    x = 32,133.52

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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.