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Finding the Fourth Proportional to 99,213.66, 136,916.39 and 53,892.54

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Solution

The fourth proportional to 99,213.66, 136,916.39 and 53,892.54 is: 74,372.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,213.66 : 136,916.39 = 53,892.54 : x
  2. Step 2: Convert to fraction form
    99,213.66/136,916.39 = 53,892.54/x
  3. Step 3: Cross multiply
    99,213.66x = 136,916.39 × 53,892.54
  4. Step 4: Simplify right side
    99,213.66x = 7,378,772,159.46
  5. Step 5: Solve for x
    x = 7,378,772,159.46/99,213.66
  6. Step 6: Final answer
    x = 74,372.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.