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Finding the Fourth Proportional to 80,710.12, 120,900.06 and 39,122.92

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Solution

The fourth proportional to 80,710.12, 120,900.06 and 39,122.92 is: 58,604.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,710.12 : 120,900.06 = 39,122.92 : x
  2. Step 2: Convert to fraction form
    80,710.12/120,900.06 = 39,122.92/x
  3. Step 3: Cross multiply
    80,710.12x = 120,900.06 × 39,122.92
  4. Step 4: Simplify right side
    80,710.12x = 4,729,963,375.38
  5. Step 5: Solve for x
    x = 4,729,963,375.38/80,710.12
  6. Step 6: Final answer
    x = 58,604.34

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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.