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Finding the Fourth Proportional to 85,310.98, 127,938.72 and 28,369.56

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Solution

The fourth proportional to 85,310.98, 127,938.72 and 28,369.56 is: 42,545.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,310.98 : 127,938.72 = 28,369.56 : x
  2. Step 2: Convert to fraction form
    85,310.98/127,938.72 = 28,369.56/x
  3. Step 3: Cross multiply
    85,310.98x = 127,938.72 × 28,369.56
  4. Step 4: Simplify right side
    85,310.98x = 3,629,565,193.36
  5. Step 5: Solve for x
    x = 3,629,565,193.36/85,310.98
  6. Step 6: Final answer
    x = 42,545.11

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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.