Home / 78,241.79-117,333.23-28,309.55

Finding the Fourth Proportional to 78,241.79, 117,333.23 and 28,309.55

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Solution

The fourth proportional to 78,241.79, 117,333.23 and 28,309.55 is: 42,453.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,241.79 : 117,333.23 = 28,309.55 : x
  2. Step 2: Convert to fraction form
    78,241.79/117,333.23 = 28,309.55/x
  3. Step 3: Cross multiply
    78,241.79x = 117,333.23 × 28,309.55
  4. Step 4: Simplify right side
    78,241.79x = 3,321,650,213.13
  5. Step 5: Solve for x
    x = 3,321,650,213.13/78,241.79
  6. Step 6: Final answer
    x = 42,453.66

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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.