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Finding the Fourth Proportional to 291,110.25, 436,665.38 and 80,748.19

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Solution

The fourth proportional to 291,110.25, 436,665.38 and 80,748.19 is: 121,122.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,110.25 : 436,665.38 = 80,748.19 : x
  2. Step 2: Convert to fraction form
    291,110.25/436,665.38 = 80,748.19/x
  3. Step 3: Cross multiply
    291,110.25x = 436,665.38 × 80,748.19
  4. Step 4: Simplify right side
    291,110.25x = 35,259,937,575.26
  5. Step 5: Solve for x
    x = 35,259,937,575.26/291,110.25
  6. Step 6: Final answer
    x = 121,122.28

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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.