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Finding the Fourth Proportional to 215,794.64, 323,691.96 and 91,136.72

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Solution

The fourth proportional to 215,794.64, 323,691.96 and 91,136.72 is: 136,705.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,794.64 : 323,691.96 = 91,136.72 : x
  2. Step 2: Convert to fraction form
    215,794.64/323,691.96 = 91,136.72/x
  3. Step 3: Cross multiply
    215,794.64x = 323,691.96 × 91,136.72
  4. Step 4: Simplify right side
    215,794.64x = 29,500,223,524.77
  5. Step 5: Solve for x
    x = 29,500,223,524.77/215,794.64
  6. Step 6: Final answer
    x = 136,705.08

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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.