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Finding the Fourth Proportional to 111,896.90, 154,421.20 and 60,913.03

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Solution

The fourth proportional to 111,896.90, 154,421.20 and 60,913.03 is: 84,061.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,896.90 : 154,421.20 = 60,913.03 : x
  2. Step 2: Convert to fraction form
    111,896.90/154,421.20 = 60,913.03/x
  3. Step 3: Cross multiply
    111,896.90x = 154,421.20 × 60,913.03
  4. Step 4: Simplify right side
    111,896.90x = 9,406,262,416.13
  5. Step 5: Solve for x
    x = 9,406,262,416.13/111,896.90
  6. Step 6: Final answer
    x = 84,061.87

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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.