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Finding the Fourth Proportional to 201,909.80, 278,637.36 and 111,269.01

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Solution

The fourth proportional to 201,909.80, 278,637.36 and 111,269.01 is: 153,552.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,909.80 : 278,637.36 = 111,269.01 : x
  2. Step 2: Convert to fraction form
    201,909.80/278,637.36 = 111,269.01/x
  3. Step 3: Cross multiply
    201,909.80x = 278,637.36 × 111,269.01
  4. Step 4: Simplify right side
    201,909.80x = 31,003,703,196.21
  5. Step 5: Solve for x
    x = 31,003,703,196.21/201,909.80
  6. Step 6: Final answer
    x = 153,552.25

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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.