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Finding the Fourth Proportional to 111,019.66, 153,203.34 and 63,288.39

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Solution

The fourth proportional to 111,019.66, 153,203.34 and 63,288.39 is: 87,335.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,019.66 : 153,203.34 = 63,288.39 : x
  2. Step 2: Convert to fraction form
    111,019.66/153,203.34 = 63,288.39/x
  3. Step 3: Cross multiply
    111,019.66x = 153,203.34 × 63,288.39
  4. Step 4: Simplify right side
    111,019.66x = 9,695,991,965.21
  5. Step 5: Solve for x
    x = 9,695,991,965.21/111,019.66
  6. Step 6: Final answer
    x = 87,335.81

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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.