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Finding the Fourth Proportional to 256,626,469.80, 384,939,704.70 and 84,061,672.20

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Solution

The fourth proportional to 256,626,469.80, 384,939,704.70 and 84,061,672.20 is: 126,092,508.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,626,469.80 : 384,939,704.70 = 84,061,672.20 : x
  2. Step 2: Convert to fraction form
    256,626,469.80/384,939,704.70 = 84,061,672.20/x
  3. Step 3: Cross multiply
    256,626,469.80x = 384,939,704.70 × 84,061,672.20
  4. Step 4: Simplify right side
    256,626,469.80x = 32,358,675,273,256,200
  5. Step 5: Solve for x
    x = 32,358,675,273,256,200/256,626,469.80
  6. Step 6: Final answer
    x = 126,092,508.30

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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.