Home / 135,781.50-203,606.40-79,639.94

Finding the Fourth Proportional to 135,781.50, 203,606.40 and 79,639.94

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Solution

The fourth proportional to 135,781.50, 203,606.40 and 79,639.94 is: 119,421.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,781.50 : 203,606.40 = 79,639.94 : x
  2. Step 2: Convert to fraction form
    135,781.50/203,606.40 = 79,639.94/x
  3. Step 3: Cross multiply
    135,781.50x = 203,606.40 × 79,639.94
  4. Step 4: Simplify right side
    135,781.50x = 16,215,201,479.62
  5. Step 5: Solve for x
    x = 16,215,201,479.62/135,781.50
  6. Step 6: Final answer
    x = 119,421.29

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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.