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Finding the Fourth Proportional to 215,980.60, 323,855.70 and 91,180.60

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Solution

The fourth proportional to 215,980.60, 323,855.70 and 91,180.60 is: 136,722.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,980.60 : 323,855.70 = 91,180.60 : x
  2. Step 2: Convert to fraction form
    215,980.60/323,855.70 = 91,180.60/x
  3. Step 3: Cross multiply
    215,980.60x = 323,855.70 × 91,180.60
  4. Step 4: Simplify right side
    215,980.60x = 29,529,357,039.42
  5. Step 5: Solve for x
    x = 29,529,357,039.42/215,980.60
  6. Step 6: Final answer
    x = 136,722.27

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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.