Home / 78,290.63-117,435.62-28,359.04

Finding the Fourth Proportional to 78,290.63, 117,435.62 and 28,359.04

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Solution

The fourth proportional to 78,290.63, 117,435.62 and 28,359.04 is: 42,538.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,290.63 : 117,435.62 = 28,359.04 : x
  2. Step 2: Convert to fraction form
    78,290.63/117,435.62 = 28,359.04/x
  3. Step 3: Cross multiply
    78,290.63x = 117,435.62 × 28,359.04
  4. Step 4: Simplify right side
    78,290.63x = 3,330,361,112.22
  5. Step 5: Solve for x
    x = 3,330,361,112.22/78,290.63
  6. Step 6: Final answer
    x = 42,538.44

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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.