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Finding the Fourth Proportional to 106,916.80, 147,560.80 and 61,585.96

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Solution

The fourth proportional to 106,916.80, 147,560.80 and 61,585.96 is: 84,997.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,916.80 : 147,560.80 = 61,585.96 : x
  2. Step 2: Convert to fraction form
    106,916.80/147,560.80 = 61,585.96/x
  3. Step 3: Cross multiply
    106,916.80x = 147,560.80 × 61,585.96
  4. Step 4: Simplify right side
    106,916.80x = 9,087,673,526.37
  5. Step 5: Solve for x
    x = 9,087,673,526.37/106,916.80
  6. Step 6: Final answer
    x = 84,997.62

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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.