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Finding the Fourth Proportional to 291,133.92, 436,698.45 and 80,771.88

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Solution

The fourth proportional to 291,133.92, 436,698.45 and 80,771.88 is: 121,157.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,133.92 : 436,698.45 = 80,771.88 : x
  2. Step 2: Convert to fraction form
    291,133.92/436,698.45 = 80,771.88/x
  3. Step 3: Cross multiply
    291,133.92x = 436,698.45 × 80,771.88
  4. Step 4: Simplify right side
    291,133.92x = 35,272,954,799.59
  5. Step 5: Solve for x
    x = 35,272,954,799.59/291,133.92
  6. Step 6: Final answer
    x = 121,157.15

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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.