Home / 287,558.47-431,131.42-109,915.75

Finding the Fourth Proportional to 287,558.47, 431,131.42 and 109,915.75

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Solution

The fourth proportional to 287,558.47, 431,131.42 and 109,915.75 is: 164,794.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,558.47 : 431,131.42 = 109,915.75 : x
  2. Step 2: Convert to fraction form
    287,558.47/431,131.42 = 109,915.75/x
  3. Step 3: Cross multiply
    287,558.47x = 431,131.42 × 109,915.75
  4. Step 4: Simplify right side
    287,558.47x = 47,388,133,377.87
  5. Step 5: Solve for x
    x = 47,388,133,377.87/287,558.47
  6. Step 6: Final answer
    x = 164,794.78

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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.