Home / 287,773.11-431,586.03-85,321.87

Finding the Fourth Proportional to 287,773.11, 431,586.03 and 85,321.87

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Solution

The fourth proportional to 287,773.11, 431,586.03 and 85,321.87 is: 127,960.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,773.11 : 431,586.03 = 85,321.87 : x
  2. Step 2: Convert to fraction form
    287,773.11/431,586.03 = 85,321.87/x
  3. Step 3: Cross multiply
    287,773.11x = 431,586.03 × 85,321.87
  4. Step 4: Simplify right side
    287,773.11x = 36,823,726,718.87
  5. Step 5: Solve for x
    x = 36,823,726,718.87/287,773.11
  6. Step 6: Final answer
    x = 127,960.97

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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.