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Finding the Fourth Proportional to 91,758.54, 137,593.31 and 53,820.21

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Solution

The fourth proportional to 91,758.54, 137,593.31 and 53,820.21 is: 80,704.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,758.54 : 137,593.31 = 53,820.21 : x
  2. Step 2: Convert to fraction form
    91,758.54/137,593.31 = 53,820.21/x
  3. Step 3: Cross multiply
    91,758.54x = 137,593.31 × 53,820.21
  4. Step 4: Simplify right side
    91,758.54x = 7,405,301,034.99
  5. Step 5: Solve for x
    x = 7,405,301,034.99/91,758.54
  6. Step 6: Final answer
    x = 80,704.21

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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.