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Finding the Fourth Proportional to 187,118.40, 280,788.24 and 68,872.80

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Solution

The fourth proportional to 187,118.40, 280,788.24 and 68,872.80 is: 103,349.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,118.40 : 280,788.24 = 68,872.80 : x
  2. Step 2: Convert to fraction form
    187,118.40/280,788.24 = 68,872.80/x
  3. Step 3: Cross multiply
    187,118.40x = 280,788.24 × 68,872.80
  4. Step 4: Simplify right side
    187,118.40x = 19,338,672,295.87
  5. Step 5: Solve for x
    x = 19,338,672,295.87/187,118.40
  6. Step 6: Final answer
    x = 103,349.92

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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.