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Finding the Fourth Proportional to 111,691.66, 154,135.50 and 60,704.51

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Solution

The fourth proportional to 111,691.66, 154,135.50 and 60,704.51 is: 83,772.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,691.66 : 154,135.50 = 60,704.51 : x
  2. Step 2: Convert to fraction form
    111,691.66/154,135.50 = 60,704.51/x
  3. Step 3: Cross multiply
    111,691.66x = 154,135.50 × 60,704.51
  4. Step 4: Simplify right side
    111,691.66x = 9,356,720,001.11
  5. Step 5: Solve for x
    x = 9,356,720,001.11/111,691.66
  6. Step 6: Final answer
    x = 83,772.77

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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.