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Finding the Fourth Proportional to 71,384.97, 107,068.95 and 18,798.56

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Solution

The fourth proportional to 71,384.97, 107,068.95 and 18,798.56 is: 28,195.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,384.97 : 107,068.95 = 18,798.56 : x
  2. Step 2: Convert to fraction form
    71,384.97/107,068.95 = 18,798.56/x
  3. Step 3: Cross multiply
    71,384.97x = 107,068.95 × 18,798.56
  4. Step 4: Simplify right side
    71,384.97x = 2,012,741,545.37
  5. Step 5: Solve for x
    x = 2,012,741,545.37/71,384.97
  6. Step 6: Final answer
    x = 28,195.59

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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.