Home / 287,772.48-431,585.09-85,321.24

Finding the Fourth Proportional to 287,772.48, 431,585.09 and 85,321.24

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Solution

The fourth proportional to 287,772.48, 431,585.09 and 85,321.24 is: 127,960.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,772.48 : 431,585.09 = 85,321.24 : x
  2. Step 2: Convert to fraction form
    287,772.48/431,585.09 = 85,321.24/x
  3. Step 3: Cross multiply
    287,772.48x = 431,585.09 × 85,321.24
  4. Step 4: Simplify right side
    287,772.48x = 36,823,376,286.36
  5. Step 5: Solve for x
    x = 36,823,376,286.36/287,772.48
  6. Step 6: Final answer
    x = 127,960.03

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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.