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Finding the Fourth Proportional to 71,135.54, 106,701 and 21,216.05

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Solution

The fourth proportional to 71,135.54, 106,701 and 21,216.05 is: 31,823.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,135.54 : 106,701 = 21,216.05 : x
  2. Step 2: Convert to fraction form
    71,135.54/106,701 = 21,216.05/x
  3. Step 3: Cross multiply
    71,135.54x = 106,701 × 21,216.05
  4. Step 4: Simplify right side
    71,135.54x = 2,263,773,751.05
  5. Step 5: Solve for x
    x = 2,263,773,751.05/71,135.54
  6. Step 6: Final answer
    x = 31,823.39

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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.