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Finding the Fourth Proportional to 140,143.45, 210,251.16 and 40,311.46

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Solution

The fourth proportional to 140,143.45, 210,251.16 and 40,311.46 is: 60,477.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,143.45 : 210,251.16 = 40,311.46 : x
  2. Step 2: Convert to fraction form
    140,143.45/210,251.16 = 40,311.46/x
  3. Step 3: Cross multiply
    140,143.45x = 210,251.16 × 40,311.46
  4. Step 4: Simplify right side
    140,143.45x = 8,475,530,175.04
  5. Step 5: Solve for x
    x = 8,475,530,175.04/140,143.45
  6. Step 6: Final answer
    x = 60,477.54

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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.