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Finding the Fourth Proportional to 139,756.32, 192,867.84 and 76,096.80

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Solution

The fourth proportional to 139,756.32, 192,867.84 and 76,096.80 is: 105,015.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,756.32 : 192,867.84 = 76,096.80 : x
  2. Step 2: Convert to fraction form
    139,756.32/192,867.84 = 76,096.80/x
  3. Step 3: Cross multiply
    139,756.32x = 192,867.84 × 76,096.80
  4. Step 4: Simplify right side
    139,756.32x = 14,676,625,446.91
  5. Step 5: Solve for x
    x = 14,676,625,446.91/139,756.32
  6. Step 6: Final answer
    x = 105,015.83

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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.