Home / 135,318.72-186,694.32-78,683.52

Finding the Fourth Proportional to 135,318.72, 186,694.32 and 78,683.52

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Solution

The fourth proportional to 135,318.72, 186,694.32 and 78,683.52 is: 108,556.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,318.72 : 186,694.32 = 78,683.52 : x
  2. Step 2: Convert to fraction form
    135,318.72/186,694.32 = 78,683.52/x
  3. Step 3: Cross multiply
    135,318.72x = 186,694.32 × 78,683.52
  4. Step 4: Simplify right side
    135,318.72x = 14,689,766,261.61
  5. Step 5: Solve for x
    x = 14,689,766,261.61/135,318.72
  6. Step 6: Final answer
    x = 108,556.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.