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Finding the Fourth Proportional to 291,128.88, 436,693.52 and 80,767.02

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Solution

The fourth proportional to 291,128.88, 436,693.52 and 80,767.02 is: 121,150.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,128.88 : 436,693.52 = 80,767.02 : x
  2. Step 2: Convert to fraction form
    291,128.88/436,693.52 = 80,767.02/x
  3. Step 3: Cross multiply
    291,128.88x = 436,693.52 × 80,767.02
  4. Step 4: Simplify right side
    291,128.88x = 35,270,431,676.41
  5. Step 5: Solve for x
    x = 35,270,431,676.41/291,128.88
  6. Step 6: Final answer
    x = 121,150.58

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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.