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Finding the Fourth Proportional to 111,583.76, 153,986.79 and 61,282.76

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Solution

The fourth proportional to 111,583.76, 153,986.79 and 61,282.76 is: 84,570.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,583.76 : 153,986.79 = 61,282.76 : x
  2. Step 2: Convert to fraction form
    111,583.76/153,986.79 = 61,282.76/x
  3. Step 3: Cross multiply
    111,583.76x = 153,986.79 × 61,282.76
  4. Step 4: Simplify right side
    111,583.76x = 9,436,735,494.74
  5. Step 5: Solve for x
    x = 9,436,735,494.74/111,583.76
  6. Step 6: Final answer
    x = 84,570.87

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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.