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Finding the Fourth Proportional to 91,687.77, 137,579.04 and 39,083.13

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Solution

The fourth proportional to 91,687.77, 137,579.04 and 39,083.13 is: 58,644.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,687.77 : 137,579.04 = 39,083.13 : x
  2. Step 2: Convert to fraction form
    91,687.77/137,579.04 = 39,083.13/x
  3. Step 3: Cross multiply
    91,687.77x = 137,579.04 × 39,083.13
  4. Step 4: Simplify right side
    91,687.77x = 5,377,019,505.60
  5. Step 5: Solve for x
    x = 5,377,019,505.60/91,687.77
  6. Step 6: Final answer
    x = 58,644.89

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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.