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Finding the Fourth Proportional to 136,686.40, 205,029.60 and 83,924.80

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Solution

The fourth proportional to 136,686.40, 205,029.60 and 83,924.80 is: 125,887.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,686.40 : 205,029.60 = 83,924.80 : x
  2. Step 2: Convert to fraction form
    136,686.40/205,029.60 = 83,924.80/x
  3. Step 3: Cross multiply
    136,686.40x = 205,029.60 × 83,924.80
  4. Step 4: Simplify right side
    136,686.40x = 17,207,068,174.08
  5. Step 5: Solve for x
    x = 17,207,068,174.08/136,686.40
  6. Step 6: Final answer
    x = 125,887.20

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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.