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Finding the Fourth Proportional to 118,138.40, 177,207.60 and 80,813.60

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Solution

The fourth proportional to 118,138.40, 177,207.60 and 80,813.60 is: 121,220.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,138.40 : 177,207.60 = 80,813.60 : x
  2. Step 2: Convert to fraction form
    118,138.40/177,207.60 = 80,813.60/x
  3. Step 3: Cross multiply
    118,138.40x = 177,207.60 × 80,813.60
  4. Step 4: Simplify right side
    118,138.40x = 14,320,784,103.36
  5. Step 5: Solve for x
    x = 14,320,784,103.36/118,138.40
  6. Step 6: Final answer
    x = 121,220.40

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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.