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Finding the Fourth Proportional to 91,379.88, 136,964.86 and 57,201.01

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Solution

The fourth proportional to 91,379.88, 136,964.86 and 57,201.01 is: 85,735.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,379.88 : 136,964.86 = 57,201.01 : x
  2. Step 2: Convert to fraction form
    91,379.88/136,964.86 = 57,201.01/x
  3. Step 3: Cross multiply
    91,379.88x = 136,964.86 × 57,201.01
  4. Step 4: Simplify right side
    91,379.88x = 7,834,527,841.09
  5. Step 5: Solve for x
    x = 7,834,527,841.09/91,379.88
  6. Step 6: Final answer
    x = 85,735.81

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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.