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Finding the Fourth Proportional to 186,987.93, 280,315.17 and 68,631.81

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Solution

The fourth proportional to 186,987.93, 280,315.17 and 68,631.81 is: 102,886.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,987.93 : 280,315.17 = 68,631.81 : x
  2. Step 2: Convert to fraction form
    186,987.93/280,315.17 = 68,631.81/x
  3. Step 3: Cross multiply
    186,987.93x = 280,315.17 × 68,631.81
  4. Step 4: Simplify right side
    186,987.93x = 19,238,537,487.56
  5. Step 5: Solve for x
    x = 19,238,537,487.56/186,987.93
  6. Step 6: Final answer
    x = 102,886.52

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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.