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Finding the Fourth Proportional to 111,536.99, 153,904.80 and 63,781.11

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Solution

The fourth proportional to 111,536.99, 153,904.80 and 63,781.11 is: 88,008.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,536.99 : 153,904.80 = 63,781.11 : x
  2. Step 2: Convert to fraction form
    111,536.99/153,904.80 = 63,781.11/x
  3. Step 3: Cross multiply
    111,536.99x = 153,904.80 × 63,781.11
  4. Step 4: Simplify right side
    111,536.99x = 9,816,218,640.36
  5. Step 5: Solve for x
    x = 9,816,218,640.36/111,536.99
  6. Step 6: Final answer
    x = 88,008.64

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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.