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Finding the Fourth Proportional to 140,555.70, 193,958.61 and 76,880.82

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Solution

The fourth proportional to 140,555.70, 193,958.61 and 76,880.82 is: 106,091.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,555.70 : 193,958.61 = 76,880.82 : x
  2. Step 2: Convert to fraction form
    140,555.70/193,958.61 = 76,880.82/x
  3. Step 3: Cross multiply
    140,555.70x = 193,958.61 × 76,880.82
  4. Step 4: Simplify right side
    140,555.70x = 14,911,696,982.86
  5. Step 5: Solve for x
    x = 14,911,696,982.86/140,555.70
  6. Step 6: Final answer
    x = 106,091.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.