Home / 139,176.20-208,610.70-76,891.40

Finding the Fourth Proportional to 139,176.20, 208,610.70 and 76,891.40

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Solution

The fourth proportional to 139,176.20, 208,610.70 and 76,891.40 is: 115,252.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,176.20 : 208,610.70 = 76,891.40 : x
  2. Step 2: Convert to fraction form
    139,176.20/208,610.70 = 76,891.40/x
  3. Step 3: Cross multiply
    139,176.20x = 208,610.70 × 76,891.40
  4. Step 4: Simplify right side
    139,176.20x = 16,040,368,777.98
  5. Step 5: Solve for x
    x = 16,040,368,777.98/139,176.20
  6. Step 6: Final answer
    x = 115,252.24

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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.