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Finding the Fourth Proportional to 78,301.98, 117,452.97 and 19,137.57

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Solution

The fourth proportional to 78,301.98, 117,452.97 and 19,137.57 is: 28,706.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,301.98 : 117,452.97 = 19,137.57 : x
  2. Step 2: Convert to fraction form
    78,301.98/117,452.97 = 19,137.57/x
  3. Step 3: Cross multiply
    78,301.98x = 117,452.97 × 19,137.57
  4. Step 4: Simplify right side
    78,301.98x = 2,247,764,435.08
  5. Step 5: Solve for x
    x = 2,247,764,435.08/78,301.98
  6. Step 6: Final answer
    x = 28,706.36

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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.