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Finding the Fourth Proportional to 215,611.88, 323,462.62 and 90,953.96

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Solution

The fourth proportional to 215,611.88, 323,462.62 and 90,953.96 is: 136,449.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,611.88 : 323,462.62 = 90,953.96 : x
  2. Step 2: Convert to fraction form
    215,611.88/323,462.62 = 90,953.96/x
  3. Step 3: Cross multiply
    215,611.88x = 323,462.62 × 90,953.96
  4. Step 4: Simplify right side
    215,611.88x = 29,420,206,200.98
  5. Step 5: Solve for x
    x = 29,420,206,200.98/215,611.88
  6. Step 6: Final answer
    x = 136,449.84

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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.