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Finding the Fourth Proportional to 111,451.89, 153,806.28 and 61,150.89

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Solution

The fourth proportional to 111,451.89, 153,806.28 and 61,150.89 is: 84,389.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,451.89 : 153,806.28 = 61,150.89 : x
  2. Step 2: Convert to fraction form
    111,451.89/153,806.28 = 61,150.89/x
  3. Step 3: Cross multiply
    111,451.89x = 153,806.28 × 61,150.89
  4. Step 4: Simplify right side
    111,451.89x = 9,405,390,909.59
  5. Step 5: Solve for x
    x = 9,405,390,909.59/111,451.89
  6. Step 6: Final answer
    x = 84,389.69

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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.