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Finding the Fourth Proportional to 91,129.98, 136,699.11 and 27,945.48

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Solution

The fourth proportional to 91,129.98, 136,699.11 and 27,945.48 is: 41,919.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,129.98 : 136,699.11 = 27,945.48 : x
  2. Step 2: Convert to fraction form
    91,129.98/136,699.11 = 27,945.48/x
  3. Step 3: Cross multiply
    91,129.98x = 136,699.11 × 27,945.48
  4. Step 4: Simplify right side
    91,129.98x = 3,820,122,244.52
  5. Step 5: Solve for x
    x = 3,820,122,244.52/91,129.98
  6. Step 6: Final answer
    x = 41,919.49

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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.