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Finding the Fourth Proportional to 118,729.64, 177,811.76 and 68,704.32

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Solution

The fourth proportional to 118,729.64, 177,811.76 and 68,704.32 is: 102,892.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,729.64 : 177,811.76 = 68,704.32 : x
  2. Step 2: Convert to fraction form
    118,729.64/177,811.76 = 68,704.32/x
  3. Step 3: Cross multiply
    118,729.64x = 177,811.76 × 68,704.32
  4. Step 4: Simplify right side
    118,729.64x = 12,216,436,058.80
  5. Step 5: Solve for x
    x = 12,216,436,058.80/118,729.64
  6. Step 6: Final answer
    x = 102,892.89

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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.