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Finding the Fourth Proportional to 71,013.20, 105,814.18 and 68,334.80

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Solution

The fourth proportional to 71,013.20, 105,814.18 and 68,334.80 is: 101,823.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,013.20 : 105,814.18 = 68,334.80 : x
  2. Step 2: Convert to fraction form
    71,013.20/105,814.18 = 68,334.80/x
  3. Step 3: Cross multiply
    71,013.20x = 105,814.18 × 68,334.80
  4. Step 4: Simplify right side
    71,013.20x = 7,230,790,827.46
  5. Step 5: Solve for x
    x = 7,230,790,827.46/71,013.20
  6. Step 6: Final answer
    x = 101,823.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.