Home / 186,639.72-279,828.32-86,693.80

Finding the Fourth Proportional to 186,639.72, 279,828.32 and 86,693.80

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Solution

The fourth proportional to 186,639.72, 279,828.32 and 86,693.80 is: 129,979.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,639.72 : 279,828.32 = 86,693.80 : x
  2. Step 2: Convert to fraction form
    186,639.72/279,828.32 = 86,693.80/x
  3. Step 3: Cross multiply
    186,639.72x = 279,828.32 × 86,693.80
  4. Step 4: Simplify right side
    186,639.72x = 24,259,380,408.42
  5. Step 5: Solve for x
    x = 24,259,380,408.42/186,639.72
  6. Step 6: Final answer
    x = 129,979.73

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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.