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Finding the Fourth Proportional to 71,185.80, 106,632.90 and 36,145.20

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Solution

The fourth proportional to 71,185.80, 106,632.90 and 36,145.20 is: 54,143.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,185.80 : 106,632.90 = 36,145.20 : x
  2. Step 2: Convert to fraction form
    71,185.80/106,632.90 = 36,145.20/x
  3. Step 3: Cross multiply
    71,185.80x = 106,632.90 × 36,145.20
  4. Step 4: Simplify right side
    71,185.80x = 3,854,267,497.08
  5. Step 5: Solve for x
    x = 3,854,267,497.08/71,185.80
  6. Step 6: Final answer
    x = 54,143.77

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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.