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Finding the Fourth Proportional to 92,535.92, 138,859.16 and 85,007.18

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Solution

The fourth proportional to 92,535.92, 138,859.16 and 85,007.18 is: 127,561.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,535.92 : 138,859.16 = 85,007.18 : x
  2. Step 2: Convert to fraction form
    92,535.92/138,859.16 = 85,007.18/x
  3. Step 3: Cross multiply
    92,535.92x = 138,859.16 × 85,007.18
  4. Step 4: Simplify right side
    92,535.92x = 11,804,024,489.44
  5. Step 5: Solve for x
    x = 11,804,024,489.44/92,535.92
  6. Step 6: Final answer
    x = 127,561.55

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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.