Home / 427,057.11-640,573.20-111,514.05

Finding the Fourth Proportional to 427,057.11, 640,573.20 and 111,514.05

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Solution

The fourth proportional to 427,057.11, 640,573.20 and 111,514.05 is: 167,267.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,057.11 : 640,573.20 = 111,514.05 : x
  2. Step 2: Convert to fraction form
    427,057.11/640,573.20 = 111,514.05/x
  3. Step 3: Cross multiply
    427,057.11x = 640,573.20 × 111,514.05
  4. Step 4: Simplify right side
    427,057.11x = 71,432,911,853.46
  5. Step 5: Solve for x
    x = 71,432,911,853.46/427,057.11
  6. Step 6: Final answer
    x = 167,267.82

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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.