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Finding the Fourth Proportional to 71,041.80, 106,620.30 and 68,737.80

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Solution

The fourth proportional to 71,041.80, 106,620.30 and 68,737.80 is: 103,162.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,041.80 : 106,620.30 = 68,737.80 : x
  2. Step 2: Convert to fraction form
    71,041.80/106,620.30 = 68,737.80/x
  3. Step 3: Cross multiply
    71,041.80x = 106,620.30 × 68,737.80
  4. Step 4: Simplify right side
    71,041.80x = 7,328,844,857.34
  5. Step 5: Solve for x
    x = 7,328,844,857.34/71,041.80
  6. Step 6: Final answer
    x = 103,162.43

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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.