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Finding the Fourth Proportional to 92,416.76, 138,618.30 and 25,855.42

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Solution

The fourth proportional to 92,416.76, 138,618.30 and 25,855.42 is: 38,781.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,416.76 : 138,618.30 = 25,855.42 : x
  2. Step 2: Convert to fraction form
    92,416.76/138,618.30 = 25,855.42/x
  3. Step 3: Cross multiply
    92,416.76x = 138,618.30 × 25,855.42
  4. Step 4: Simplify right side
    92,416.76x = 3,584,034,019.64
  5. Step 5: Solve for x
    x = 3,584,034,019.64/92,416.76
  6. Step 6: Final answer
    x = 38,781.21

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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.