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Finding the Fourth Proportional to 185,991, 278,986.64 and 61,332

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Solution

The fourth proportional to 185,991, 278,986.64 and 61,332 is: 91,998.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,991 : 278,986.64 = 61,332 : x
  2. Step 2: Convert to fraction form
    185,991/278,986.64 = 61,332/x
  3. Step 3: Cross multiply
    185,991x = 278,986.64 × 61,332
  4. Step 4: Simplify right side
    185,991x = 17,110,808,297.82
  5. Step 5: Solve for x
    x = 17,110,808,297.82/185,991
  6. Step 6: Final answer
    x = 91,998.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.