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Finding the Fourth Proportional to 107,918.70, 161,878.05 and 60,485.10

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Solution

The fourth proportional to 107,918.70, 161,878.05 and 60,485.10 is: 90,727.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,918.70 : 161,878.05 = 60,485.10 : x
  2. Step 2: Convert to fraction form
    107,918.70/161,878.05 = 60,485.10/x
  3. Step 3: Cross multiply
    107,918.70x = 161,878.05 × 60,485.10
  4. Step 4: Simplify right side
    107,918.70x = 9,791,210,042.06
  5. Step 5: Solve for x
    x = 9,791,210,042.06/107,918.70
  6. Step 6: Final answer
    x = 90,727.65

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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.