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Finding the Fourth Proportional to 121,959.66, 182,993.80 and 77,574.90

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Solution

The fourth proportional to 121,959.66, 182,993.80 and 77,574.90 is: 116,396.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,959.66 : 182,993.80 = 77,574.90 : x
  2. Step 2: Convert to fraction form
    121,959.66/182,993.80 = 77,574.90/x
  3. Step 3: Cross multiply
    121,959.66x = 182,993.80 × 77,574.90
  4. Step 4: Simplify right side
    121,959.66x = 14,195,725,735.62
  5. Step 5: Solve for x
    x = 14,195,725,735.62/121,959.66
  6. Step 6: Final answer
    x = 116,396.89

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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.