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Finding the Fourth Proportional to 427,167.93, 640,843.83 and 127,672.86

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Solution

The fourth proportional to 427,167.93, 640,843.83 and 127,672.86 is: 191,536.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,167.93 : 640,843.83 = 127,672.86 : x
  2. Step 2: Convert to fraction form
    427,167.93/640,843.83 = 127,672.86/x
  3. Step 3: Cross multiply
    427,167.93x = 640,843.83 × 127,672.86
  4. Step 4: Simplify right side
    427,167.93x = 81,818,364,589.45
  5. Step 5: Solve for x
    x = 81,818,364,589.45/427,167.93
  6. Step 6: Final answer
    x = 191,536.77

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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.