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Finding the Fourth Proportional to 71,237.20, 106,855.80 and 68,203.60

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Solution

The fourth proportional to 71,237.20, 106,855.80 and 68,203.60 is: 102,305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,237.20 : 106,855.80 = 68,203.60 : x
  2. Step 2: Convert to fraction form
    71,237.20/106,855.80 = 68,203.60/x
  3. Step 3: Cross multiply
    71,237.20x = 106,855.80 × 68,203.60
  4. Step 4: Simplify right side
    71,237.20x = 7,287,950,240.88
  5. Step 5: Solve for x
    x = 7,287,950,240.88/71,237.20
  6. Step 6: Final answer
    x = 102,305.40

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1.5x scale

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.