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Finding the Fourth Proportional to 71,078.80, 106,618.20 and 36,086.80

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Solution

The fourth proportional to 71,078.80, 106,618.20 and 36,086.80 is: 54,130.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,078.80 : 106,618.20 = 36,086.80 : x
  2. Step 2: Convert to fraction form
    71,078.80/106,618.20 = 36,086.80/x
  3. Step 3: Cross multiply
    71,078.80x = 106,618.20 × 36,086.80
  4. Step 4: Simplify right side
    71,078.80x = 3,847,509,659.76
  5. Step 5: Solve for x
    x = 3,847,509,659.76/71,078.80
  6. Step 6: Final answer
    x = 54,130.20

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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.