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Finding the Fourth Proportional to 68,872.29, 103,348.32 and 28,887.72

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Solution

The fourth proportional to 68,872.29, 103,348.32 and 28,887.72 is: 43,348.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,872.29 : 103,348.32 = 28,887.72 : x
  2. Step 2: Convert to fraction form
    68,872.29/103,348.32 = 28,887.72/x
  3. Step 3: Cross multiply
    68,872.29x = 103,348.32 × 28,887.72
  4. Step 4: Simplify right side
    68,872.29x = 2,985,496,741.67
  5. Step 5: Solve for x
    x = 2,985,496,741.67/68,872.29
  6. Step 6: Final answer
    x = 43,348.30

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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.