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Finding the Fourth Proportional to 186,553.20, 279,870.12 and 86,640.24

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Solution

The fourth proportional to 186,553.20, 279,870.12 and 86,640.24 is: 129,979.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,553.20 : 279,870.12 = 86,640.24 : x
  2. Step 2: Convert to fraction form
    186,553.20/279,870.12 = 86,640.24/x
  3. Step 3: Cross multiply
    186,553.20x = 279,870.12 × 86,640.24
  4. Step 4: Simplify right side
    186,553.20x = 24,248,014,365.63
  5. Step 5: Solve for x
    x = 24,248,014,365.63/186,553.20
  6. Step 6: Final answer
    x = 129,979.09

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1.5x scale

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.