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Finding the Fourth Proportional to 120,589.51, 180,005.99 and 111,695.71

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Solution

The fourth proportional to 120,589.51, 180,005.99 and 111,695.71 is: 166,730.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,589.51 : 180,005.99 = 111,695.71 : x
  2. Step 2: Convert to fraction form
    120,589.51/180,005.99 = 111,695.71/x
  3. Step 3: Cross multiply
    120,589.51x = 180,005.99 × 111,695.71
  4. Step 4: Simplify right side
    120,589.51x = 20,105,896,857.30
  5. Step 5: Solve for x
    x = 20,105,896,857.30/120,589.51
  6. Step 6: Final answer
    x = 166,730.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.