Home / 78,418.20-117,561.16-34,011.50

Finding the Fourth Proportional to 78,418.20, 117,561.16 and 34,011.50

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Solution

The fourth proportional to 78,418.20, 117,561.16 and 34,011.50 is: 50,988.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,418.20 : 117,561.16 = 34,011.50 : x
  2. Step 2: Convert to fraction form
    78,418.20/117,561.16 = 34,011.50/x
  3. Step 3: Cross multiply
    78,418.20x = 117,561.16 × 34,011.50
  4. Step 4: Simplify right side
    78,418.20x = 3,998,431,772.27
  5. Step 5: Solve for x
    x = 3,998,431,772.27/78,418.20
  6. Step 6: Final answer
    x = 50,988.57

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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.