Home / 139,786.20-208,665.84-129,379.74

Finding the Fourth Proportional to 139,786.20, 208,665.84 and 129,379.74

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Solution

The fourth proportional to 139,786.20, 208,665.84 and 129,379.74 is: 193,131.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,786.20 : 208,665.84 = 129,379.74 : x
  2. Step 2: Convert to fraction form
    139,786.20/208,665.84 = 129,379.74/x
  3. Step 3: Cross multiply
    139,786.20x = 208,665.84 × 129,379.74
  4. Step 4: Simplify right side
    139,786.20x = 26,997,132,126.08
  5. Step 5: Solve for x
    x = 26,997,132,126.08/139,786.20
  6. Step 6: Final answer
    x = 193,131.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.