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Finding the Fourth Proportional to 140,604.21, 210,928.30 and 45,812.38

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Solution

The fourth proportional to 140,604.21, 210,928.30 and 45,812.38 is: 68,725.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,604.21 : 210,928.30 = 45,812.38 : x
  2. Step 2: Convert to fraction form
    140,604.21/210,928.30 = 45,812.38/x
  3. Step 3: Cross multiply
    140,604.21x = 210,928.30 × 45,812.38
  4. Step 4: Simplify right side
    140,604.21x = 9,663,127,432.35
  5. Step 5: Solve for x
    x = 9,663,127,432.35/140,604.21
  6. Step 6: Final answer
    x = 68,725.73

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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.