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Finding the Fourth Proportional to 71,017.71, 106,508.13 and 21,086.07

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Solution

The fourth proportional to 71,017.71, 106,508.13 and 21,086.07 is: 31,623.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,017.71 : 106,508.13 = 21,086.07 : x
  2. Step 2: Convert to fraction form
    71,017.71/106,508.13 = 21,086.07/x
  3. Step 3: Cross multiply
    71,017.71x = 106,508.13 × 21,086.07
  4. Step 4: Simplify right side
    71,017.71x = 2,245,837,884.75
  5. Step 5: Solve for x
    x = 2,245,837,884.75/71,017.71
  6. Step 6: Final answer
    x = 31,623.63

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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.