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Finding the Fourth Proportional to 61,357.60, 91,939.20 and 39,131.20

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Solution

The fourth proportional to 61,357.60, 91,939.20 and 39,131.20 is: 58,634.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,357.60 : 91,939.20 = 39,131.20 : x
  2. Step 2: Convert to fraction form
    61,357.60/91,939.20 = 39,131.20/x
  3. Step 3: Cross multiply
    61,357.60x = 91,939.20 × 39,131.20
  4. Step 4: Simplify right side
    61,357.60x = 3,597,691,223.04
  5. Step 5: Solve for x
    x = 3,597,691,223.04/61,357.60
  6. Step 6: Final answer
    x = 58,634.81

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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.