Home / 291,147.39-436,721.28-80,785.53

Finding the Fourth Proportional to 291,147.39, 436,721.28 and 80,785.53

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Solution

The fourth proportional to 291,147.39, 436,721.28 and 80,785.53 is: 121,178.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,147.39 : 436,721.28 = 80,785.53 : x
  2. Step 2: Convert to fraction form
    291,147.39/436,721.28 = 80,785.53/x
  3. Step 3: Cross multiply
    291,147.39x = 436,721.28 × 80,785.53
  4. Step 4: Simplify right side
    291,147.39x = 35,280,760,067.08
  5. Step 5: Solve for x
    x = 35,280,760,067.08/291,147.39
  6. Step 6: Final answer
    x = 121,178.35

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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.