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Finding the Fourth Proportional to 92,404.20, 138,606.30 and 57,412.20

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Solution

The fourth proportional to 92,404.20, 138,606.30 and 57,412.20 is: 86,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,404.20 : 138,606.30 = 57,412.20 : x
  2. Step 2: Convert to fraction form
    92,404.20/138,606.30 = 57,412.20/x
  3. Step 3: Cross multiply
    92,404.20x = 138,606.30 × 57,412.20
  4. Step 4: Simplify right side
    92,404.20x = 7,957,692,616.86
  5. Step 5: Solve for x
    x = 7,957,692,616.86/92,404.20
  6. Step 6: Final answer
    x = 86,118.30

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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.