Home / 140,405.16-193,758.78-76,743.42

Finding the Fourth Proportional to 140,405.16, 193,758.78 and 76,743.42

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Solution

The fourth proportional to 140,405.16, 193,758.78 and 76,743.42 is: 105,905.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,405.16 : 193,758.78 = 76,743.42 : x
  2. Step 2: Convert to fraction form
    140,405.16/193,758.78 = 76,743.42/x
  3. Step 3: Cross multiply
    140,405.16x = 193,758.78 × 76,743.42
  4. Step 4: Simplify right side
    140,405.16x = 14,869,711,432.23
  5. Step 5: Solve for x
    x = 14,869,711,432.23/140,405.16
  6. Step 6: Final answer
    x = 105,905.73

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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.