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Finding the Fourth Proportional to 186,500, 279,749.68 and 86,605.56

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Solution

The fourth proportional to 186,500, 279,749.68 and 86,605.56 is: 129,908.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,500 : 279,749.68 = 86,605.56 : x
  2. Step 2: Convert to fraction form
    186,500/279,749.68 = 86,605.56/x
  3. Step 3: Cross multiply
    186,500x = 279,749.68 × 86,605.56
  4. Step 4: Simplify right side
    186,500x = 24,227,877,696.22
  5. Step 5: Solve for x
    x = 24,227,877,696.22/186,500
  6. Step 6: Final answer
    x = 129,908.19

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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.