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Finding the Fourth Proportional to 92,816.16, 138,916.17 and 84,515.28

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Solution

The fourth proportional to 92,816.16, 138,916.17 and 84,515.28 is: 126,492.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,816.16 : 138,916.17 = 84,515.28 : x
  2. Step 2: Convert to fraction form
    92,816.16/138,916.17 = 84,515.28/x
  3. Step 3: Cross multiply
    92,816.16x = 138,916.17 × 84,515.28
  4. Step 4: Simplify right side
    92,816.16x = 11,740,539,004.08
  5. Step 5: Solve for x
    x = 11,740,539,004.08/92,816.16
  6. Step 6: Final answer
    x = 126,492.40

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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.