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Finding the Fourth Proportional to 71,377.40, 107,057.81 and 18,790.98

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Solution

The fourth proportional to 71,377.40, 107,057.81 and 18,790.98 is: 28,184.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,377.40 : 107,057.81 = 18,790.98 : x
  2. Step 2: Convert to fraction form
    71,377.40/107,057.81 = 18,790.98/x
  3. Step 3: Cross multiply
    71,377.40x = 107,057.81 × 18,790.98
  4. Step 4: Simplify right side
    71,377.40x = 2,011,721,166.55
  5. Step 5: Solve for x
    x = 2,011,721,166.55/71,377.40
  6. Step 6: Final answer
    x = 28,184.29

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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.