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Finding the Fourth Proportional to 215,751,167.80, 323,626,751.70 and 72,143,999.80

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Solution

The fourth proportional to 215,751,167.80, 323,626,751.70 and 72,143,999.80 is: 108,215,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,751,167.80 : 323,626,751.70 = 72,143,999.80 : x
  2. Step 2: Convert to fraction form
    215,751,167.80/323,626,751.70 = 72,143,999.80/x
  3. Step 3: Cross multiply
    215,751,167.80x = 323,626,751.70 × 72,143,999.80
  4. Step 4: Simplify right side
    215,751,167.80x = 23,347,728,309,919,448
  5. Step 5: Solve for x
    x = 23,347,728,309,919,448/215,751,167.80
  6. Step 6: Final answer
    x = 108,215,999.70

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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.