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Finding the Fourth Proportional to 266,668.80, 400,003.20 and 79,680.30

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Solution

The fourth proportional to 266,668.80, 400,003.20 and 79,680.30 is: 119,520.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,668.80 : 400,003.20 = 79,680.30 : x
  2. Step 2: Convert to fraction form
    266,668.80/400,003.20 = 79,680.30/x
  3. Step 3: Cross multiply
    266,668.80x = 400,003.20 × 79,680.30
  4. Step 4: Simplify right side
    266,668.80x = 31,872,374,976.96
  5. Step 5: Solve for x
    x = 31,872,374,976.96/266,668.80
  6. Step 6: Final answer
    x = 119,520.45

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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.