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Finding the Fourth Proportional to 186,389.88, 279,383.72 and 91,509.72

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Solution

The fourth proportional to 186,389.88, 279,383.72 and 91,509.72 is: 137,165.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,389.88 : 279,383.72 = 91,509.72 : x
  2. Step 2: Convert to fraction form
    186,389.88/279,383.72 = 91,509.72/x
  3. Step 3: Cross multiply
    186,389.88x = 279,383.72 × 91,509.72
  4. Step 4: Simplify right side
    186,389.88x = 25,566,325,989.76
  5. Step 5: Solve for x
    x = 25,566,325,989.76/186,389.88
  6. Step 6: Final answer
    x = 137,165.85

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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.