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Finding the Fourth Proportional to 71,326.71, 106,981.97 and 18,740.30

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Solution

The fourth proportional to 71,326.71, 106,981.97 and 18,740.30 is: 28,108.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,326.71 : 106,981.97 = 18,740.30 : x
  2. Step 2: Convert to fraction form
    71,326.71/106,981.97 = 18,740.30/x
  3. Step 3: Cross multiply
    71,326.71x = 106,981.97 × 18,740.30
  4. Step 4: Simplify right side
    71,326.71x = 2,004,873,583.78
  5. Step 5: Solve for x
    x = 2,004,873,583.78/71,326.71
  6. Step 6: Final answer
    x = 28,108.31

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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.