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Finding the Fourth Proportional to 136,953.60, 205,300.80 and 80,836.80

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Solution

The fourth proportional to 136,953.60, 205,300.80 and 80,836.80 is: 121,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,953.60 : 205,300.80 = 80,836.80 : x
  2. Step 2: Convert to fraction form
    136,953.60/205,300.80 = 80,836.80/x
  3. Step 3: Cross multiply
    136,953.60x = 205,300.80 × 80,836.80
  4. Step 4: Simplify right side
    136,953.60x = 16,595,859,709.44
  5. Step 5: Solve for x
    x = 16,595,859,709.44/136,953.60
  6. Step 6: Final answer
    x = 121,178.70

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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.