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Finding the Fourth Proportional to 171,990.10, 257,474.85 and 127,812.70

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Solution

The fourth proportional to 171,990.10, 257,474.85 and 127,812.70 is: 191,339.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,990.10 : 257,474.85 = 127,812.70 : x
  2. Step 2: Convert to fraction form
    171,990.10/257,474.85 = 127,812.70/x
  3. Step 3: Cross multiply
    171,990.10x = 257,474.85 × 127,812.70
  4. Step 4: Simplify right side
    171,990.10x = 32,908,555,760.60
  5. Step 5: Solve for x
    x = 32,908,555,760.60/171,990.10
  6. Step 6: Final answer
    x = 191,339.83

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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.