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Finding the Fourth Proportional to 78,442.80, 117,469.80 and 50,319.60

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Solution

The fourth proportional to 78,442.80, 117,469.80 and 50,319.60 is: 75,354.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,442.80 : 117,469.80 = 50,319.60 : x
  2. Step 2: Convert to fraction form
    78,442.80/117,469.80 = 50,319.60/x
  3. Step 3: Cross multiply
    78,442.80x = 117,469.80 × 50,319.60
  4. Step 4: Simplify right side
    78,442.80x = 5,911,033,348.08
  5. Step 5: Solve for x
    x = 5,911,033,348.08/78,442.80
  6. Step 6: Final answer
    x = 75,354.70

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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.