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Finding the Fourth Proportional to 291,148.50, 436,722.95 and 80,786.64

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Solution

The fourth proportional to 291,148.50, 436,722.95 and 80,786.64 is: 121,180.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,148.50 : 436,722.95 = 80,786.64 : x
  2. Step 2: Convert to fraction form
    291,148.50/436,722.95 = 80,786.64/x
  3. Step 3: Cross multiply
    291,148.50x = 436,722.95 × 80,786.64
  4. Step 4: Simplify right side
    291,148.50x = 35,281,379,943.35
  5. Step 5: Solve for x
    x = 35,281,379,943.35/291,148.50
  6. Step 6: Final answer
    x = 121,180.02

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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.