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Finding the Fourth Proportional to 281,894.31, 388,989.95 and 161,011.53

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Solution

The fourth proportional to 281,894.31, 388,989.95 and 161,011.53 is: 222,182.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,894.31 : 388,989.95 = 161,011.53 : x
  2. Step 2: Convert to fraction form
    281,894.31/388,989.95 = 161,011.53/x
  3. Step 3: Cross multiply
    281,894.31x = 388,989.95 × 161,011.53
  4. Step 4: Simplify right side
    281,894.31x = 62,631,866,199.07
  5. Step 5: Solve for x
    x = 62,631,866,199.07/281,894.31
  6. Step 6: Final answer
    x = 222,182.09

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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.