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Finding the Fourth Proportional to 91,433.60, 137,091.20 and 38,828.80

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Solution

The fourth proportional to 91,433.60, 137,091.20 and 38,828.80 is: 58,218.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,433.60 : 137,091.20 = 38,828.80 : x
  2. Step 2: Convert to fraction form
    91,433.60/137,091.20 = 38,828.80/x
  3. Step 3: Cross multiply
    91,433.60x = 137,091.20 × 38,828.80
  4. Step 4: Simplify right side
    91,433.60x = 5,323,086,786.56
  5. Step 5: Solve for x
    x = 5,323,086,786.56/91,433.60
  6. Step 6: Final answer
    x = 58,218.06

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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.