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Finding the Fourth Proportional to 73,117.20, 109,704.60 and 28,736.40

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Solution

The fourth proportional to 73,117.20, 109,704.60 and 28,736.40 is: 43,115.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,117.20 : 109,704.60 = 28,736.40 : x
  2. Step 2: Convert to fraction form
    73,117.20/109,704.60 = 28,736.40/x
  3. Step 3: Cross multiply
    73,117.20x = 109,704.60 × 28,736.40
  4. Step 4: Simplify right side
    73,117.20x = 3,152,515,267.44
  5. Step 5: Solve for x
    x = 3,152,515,267.44/73,117.20
  6. Step 6: Final answer
    x = 43,115.92

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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.