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Finding the Fourth Proportional to 91,857.60, 137,721.60 and 41,961.60

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Solution

The fourth proportional to 91,857.60, 137,721.60 and 41,961.60 is: 62,912.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,857.60 : 137,721.60 = 41,961.60 : x
  2. Step 2: Convert to fraction form
    91,857.60/137,721.60 = 41,961.60/x
  3. Step 3: Cross multiply
    91,857.60x = 137,721.60 × 41,961.60
  4. Step 4: Simplify right side
    91,857.60x = 5,779,018,690.56
  5. Step 5: Solve for x
    x = 5,779,018,690.56/91,857.60
  6. Step 6: Final answer
    x = 62,912.80

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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.