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Finding the Fourth Proportional to 71,242.94, 106,834.34 and 21,330.14

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Solution

The fourth proportional to 71,242.94, 106,834.34 and 21,330.14 is: 31,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,242.94 : 106,834.34 = 21,330.14 : x
  2. Step 2: Convert to fraction form
    71,242.94/106,834.34 = 21,330.14/x
  3. Step 3: Cross multiply
    71,242.94x = 106,834.34 × 21,330.14
  4. Step 4: Simplify right side
    71,242.94x = 2,278,790,948.16
  5. Step 5: Solve for x
    x = 2,278,790,948.16/71,242.94
  6. Step 6: Final answer
    x = 31,986.20

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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.