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Finding the Fourth Proportional to 215,788.80, 323,510.40 and 91,027.20

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Solution

The fourth proportional to 215,788.80, 323,510.40 and 91,027.20 is: 136,467.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,788.80 : 323,510.40 = 91,027.20 : x
  2. Step 2: Convert to fraction form
    215,788.80/323,510.40 = 91,027.20/x
  3. Step 3: Cross multiply
    215,788.80x = 323,510.40 × 91,027.20
  4. Step 4: Simplify right side
    215,788.80x = 29,448,245,882.88
  5. Step 5: Solve for x
    x = 29,448,245,882.88/215,788.80
  6. Step 6: Final answer
    x = 136,467.91

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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.