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Finding the Fourth Proportional to 312,143.86, 430,757.85 and 168,903.85

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Solution

The fourth proportional to 312,143.86, 430,757.85 and 168,903.85 is: 233,086.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,143.86 : 430,757.85 = 168,903.85 : x
  2. Step 2: Convert to fraction form
    312,143.86/430,757.85 = 168,903.85/x
  3. Step 3: Cross multiply
    312,143.86x = 430,757.85 × 168,903.85
  4. Step 4: Simplify right side
    312,143.86x = 72,756,659,282.72
  5. Step 5: Solve for x
    x = 72,756,659,282.72/312,143.86
  6. Step 6: Final answer
    x = 233,086.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.