Home / 78,065.43-117,084.83-28,135.59

Finding the Fourth Proportional to 78,065.43, 117,084.83 and 28,135.59

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Solution

The fourth proportional to 78,065.43, 117,084.83 and 28,135.59 is: 42,198.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,065.43 : 117,084.83 = 28,135.59 : x
  2. Step 2: Convert to fraction form
    78,065.43/117,084.83 = 28,135.59/x
  3. Step 3: Cross multiply
    78,065.43x = 117,084.83 × 28,135.59
  4. Step 4: Simplify right side
    78,065.43x = 3,294,250,631.42
  5. Step 5: Solve for x
    x = 3,294,250,631.42/78,065.43
  6. Step 6: Final answer
    x = 42,198.58

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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.