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Finding the Fourth Proportional to 215,620.80, 322,663.20 and 136,772.80

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Solution

The fourth proportional to 215,620.80, 322,663.20 and 136,772.80 is: 204,672.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,620.80 : 322,663.20 = 136,772.80 : x
  2. Step 2: Convert to fraction form
    215,620.80/322,663.20 = 136,772.80/x
  3. Step 3: Cross multiply
    215,620.80x = 322,663.20 × 136,772.80
  4. Step 4: Simplify right side
    215,620.80x = 44,131,549,320.96
  5. Step 5: Solve for x
    x = 44,131,549,320.96/215,620.80
  6. Step 6: Final answer
    x = 204,672.04

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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.