Home / 78,418.08-117,561-34,011.40

Finding the Fourth Proportional to 78,418.08, 117,561 and 34,011.40

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Solution

The fourth proportional to 78,418.08, 117,561 and 34,011.40 is: 50,988.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,418.08 : 117,561 = 34,011.40 : x
  2. Step 2: Convert to fraction form
    78,418.08/117,561 = 34,011.40/x
  3. Step 3: Cross multiply
    78,418.08x = 117,561 × 34,011.40
  4. Step 4: Simplify right side
    78,418.08x = 3,998,414,195.40
  5. Step 5: Solve for x
    x = 3,998,414,195.40/78,418.08
  6. Step 6: Final answer
    x = 50,988.42

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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.