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Finding the Fourth Proportional to 136,725.20, 205,087.80 and 83,963.60

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Solution

The fourth proportional to 136,725.20, 205,087.80 and 83,963.60 is: 125,945.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,725.20 : 205,087.80 = 83,963.60 : x
  2. Step 2: Convert to fraction form
    136,725.20/205,087.80 = 83,963.60/x
  3. Step 3: Cross multiply
    136,725.20x = 205,087.80 × 83,963.60
  4. Step 4: Simplify right side
    136,725.20x = 17,219,910,004.08
  5. Step 5: Solve for x
    x = 17,219,910,004.08/136,725.20
  6. Step 6: Final answer
    x = 125,945.40

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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.