Home / 139,140.20-208,556.70-76,855.40

Finding the Fourth Proportional to 139,140.20, 208,556.70 and 76,855.40

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Solution

The fourth proportional to 139,140.20, 208,556.70 and 76,855.40 is: 115,198.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,140.20 : 208,556.70 = 76,855.40 : x
  2. Step 2: Convert to fraction form
    139,140.20/208,556.70 = 76,855.40/x
  3. Step 3: Cross multiply
    139,140.20x = 208,556.70 × 76,855.40
  4. Step 4: Simplify right side
    139,140.20x = 16,028,708,601.18
  5. Step 5: Solve for x
    x = 16,028,708,601.18/139,140.20
  6. Step 6: Final answer
    x = 115,198.26

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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.