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Finding the Fourth Proportional to 78,519.55, 117,734.56 and 53,589.78

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Solution

The fourth proportional to 78,519.55, 117,734.56 and 53,589.78 is: 80,354.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,519.55 : 117,734.56 = 53,589.78 : x
  2. Step 2: Convert to fraction form
    78,519.55/117,734.56 = 53,589.78/x
  3. Step 3: Cross multiply
    78,519.55x = 117,734.56 × 53,589.78
  4. Step 4: Simplify right side
    78,519.55x = 6,309,369,168.80
  5. Step 5: Solve for x
    x = 6,309,369,168.80/78,519.55
  6. Step 6: Final answer
    x = 80,354.12

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1.5x scale

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.