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Finding the Fourth Proportional to 92,310.78, 138,467.28 and 25,746.86

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Solution

The fourth proportional to 92,310.78, 138,467.28 and 25,746.86 is: 38,620.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,310.78 : 138,467.28 = 25,746.86 : x
  2. Step 2: Convert to fraction form
    92,310.78/138,467.28 = 25,746.86/x
  3. Step 3: Cross multiply
    92,310.78x = 138,467.28 × 25,746.86
  4. Step 4: Simplify right side
    92,310.78x = 3,565,096,980.40
  5. Step 5: Solve for x
    x = 3,565,096,980.40/92,310.78
  6. Step 6: Final answer
    x = 38,620.59

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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.