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Finding the Fourth Proportional to 91,750, 137,648.12 and 26,086

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Solution

The fourth proportional to 91,750, 137,648.12 and 26,086 is: 39,135.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,750 : 137,648.12 = 26,086 : x
  2. Step 2: Convert to fraction form
    91,750/137,648.12 = 26,086/x
  3. Step 3: Cross multiply
    91,750x = 137,648.12 × 26,086
  4. Step 4: Simplify right side
    91,750x = 3,590,688,858.32
  5. Step 5: Solve for x
    x = 3,590,688,858.32/91,750
  6. Step 6: Final answer
    x = 39,135.57

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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.