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Finding the Fourth Proportional to 107,916.70, 161,875.05 and 105,843.10

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Solution

The fourth proportional to 107,916.70, 161,875.05 and 105,843.10 is: 158,764.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,916.70 : 161,875.05 = 105,843.10 : x
  2. Step 2: Convert to fraction form
    107,916.70/161,875.05 = 105,843.10/x
  3. Step 3: Cross multiply
    107,916.70x = 161,875.05 × 105,843.10
  4. Step 4: Simplify right side
    107,916.70x = 17,133,357,104.66
  5. Step 5: Solve for x
    x = 17,133,357,104.66/107,916.70
  6. Step 6: Final answer
    x = 158,764.65

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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.