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Finding the Fourth Proportional to 117,816, 176,758.80 and 67,931.88

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Solution

The fourth proportional to 117,816, 176,758.80 and 67,931.88 is: 101,917.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,816 : 176,758.80 = 67,931.88 : x
  2. Step 2: Convert to fraction form
    117,816/176,758.80 = 67,931.88/x
  3. Step 3: Cross multiply
    117,816x = 176,758.80 × 67,931.88
  4. Step 4: Simplify right side
    117,816x = 12,007,557,590.54
  5. Step 5: Solve for x
    x = 12,007,557,590.54/117,816
  6. Step 6: Final answer
    x = 101,917.89

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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.