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Finding the Fourth Proportional to 291,179.16, 436,787.57 and 91,507.88

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Solution

The fourth proportional to 291,179.16, 436,787.57 and 91,507.88 is: 137,267.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,179.16 : 436,787.57 = 91,507.88 : x
  2. Step 2: Convert to fraction form
    291,179.16/436,787.57 = 91,507.88/x
  3. Step 3: Cross multiply
    291,179.16x = 436,787.57 × 91,507.88
  4. Step 4: Simplify right side
    291,179.16x = 39,969,505,861.79
  5. Step 5: Solve for x
    x = 39,969,505,861.79/291,179.16
  6. Step 6: Final answer
    x = 137,267.74

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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.