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Finding the Fourth Proportional to 118,392.60, 177,588.90 and 71,736.60

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Solution

The fourth proportional to 118,392.60, 177,588.90 and 71,736.60 is: 107,604.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,392.60 : 177,588.90 = 71,736.60 : x
  2. Step 2: Convert to fraction form
    118,392.60/177,588.90 = 71,736.60/x
  3. Step 3: Cross multiply
    118,392.60x = 177,588.90 × 71,736.60
  4. Step 4: Simplify right side
    118,392.60x = 12,739,623,883.74
  5. Step 5: Solve for x
    x = 12,739,623,883.74/118,392.60
  6. Step 6: Final answer
    x = 107,604.90

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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.