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Finding the Fourth Proportional to 61,171.80, 91,757.70 and 51,840.60

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Solution

The fourth proportional to 61,171.80, 91,757.70 and 51,840.60 is: 77,760.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,171.80 : 91,757.70 = 51,840.60 : x
  2. Step 2: Convert to fraction form
    61,171.80/91,757.70 = 51,840.60/x
  3. Step 3: Cross multiply
    61,171.80x = 91,757.70 × 51,840.60
  4. Step 4: Simplify right side
    61,171.80x = 4,756,774,222.62
  5. Step 5: Solve for x
    x = 4,756,774,222.62/61,171.80
  6. Step 6: Final answer
    x = 77,760.90

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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.