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Finding the Fourth Proportional to 139,760.70, 192,867.84 and 76,098.50

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Solution

The fourth proportional to 139,760.70, 192,867.84 and 76,098.50 is: 105,014.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,760.70 : 192,867.84 = 76,098.50 : x
  2. Step 2: Convert to fraction form
    139,760.70/192,867.84 = 76,098.50/x
  3. Step 3: Cross multiply
    139,760.70x = 192,867.84 × 76,098.50
  4. Step 4: Simplify right side
    139,760.70x = 14,676,952,357.90
  5. Step 5: Solve for x
    x = 14,676,952,357.90/139,760.70
  6. Step 6: Final answer
    x = 105,014.87

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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.