Home / 138,868.32-208,135.44-79,741.92

Finding the Fourth Proportional to 138,868.32, 208,135.44 and 79,741.92

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Solution

The fourth proportional to 138,868.32, 208,135.44 and 79,741.92 is: 119,516.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,868.32 : 208,135.44 = 79,741.92 : x
  2. Step 2: Convert to fraction form
    138,868.32/208,135.44 = 79,741.92/x
  3. Step 3: Cross multiply
    138,868.32x = 208,135.44 × 79,741.92
  4. Step 4: Simplify right side
    138,868.32x = 16,597,119,605.64
  5. Step 5: Solve for x
    x = 16,597,119,605.64/138,868.32
  6. Step 6: Final answer
    x = 119,516.96

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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.