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Finding the Fourth Proportional to 136,690.80, 205,036.20 and 96,601.20

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Solution

The fourth proportional to 136,690.80, 205,036.20 and 96,601.20 is: 144,901.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,690.80 : 205,036.20 = 96,601.20 : x
  2. Step 2: Convert to fraction form
    136,690.80/205,036.20 = 96,601.20/x
  3. Step 3: Cross multiply
    136,690.80x = 205,036.20 × 96,601.20
  4. Step 4: Simplify right side
    136,690.80x = 19,806,742,963.44
  5. Step 5: Solve for x
    x = 19,806,742,963.44/136,690.80
  6. Step 6: Final answer
    x = 144,901.80

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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.