Home / 287,617.36-431,427-87,936.96

Finding the Fourth Proportional to 287,617.36, 431,427 and 87,936.96

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Solution

The fourth proportional to 287,617.36, 431,427 and 87,936.96 is: 131,905.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,617.36 : 431,427 = 87,936.96 : x
  2. Step 2: Convert to fraction form
    287,617.36/431,427 = 87,936.96/x
  3. Step 3: Cross multiply
    287,617.36x = 431,427 × 87,936.96
  4. Step 4: Simplify right side
    287,617.36x = 37,938,378,841.92
  5. Step 5: Solve for x
    x = 37,938,378,841.92/287,617.36
  6. Step 6: Final answer
    x = 131,905.73

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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.