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Finding the Fourth Proportional to 61,064.85, 91,601.73 and 18,939.60

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Solution

The fourth proportional to 61,064.85, 91,601.73 and 18,939.60 is: 28,410.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,064.85 : 91,601.73 = 18,939.60 : x
  2. Step 2: Convert to fraction form
    61,064.85/91,601.73 = 18,939.60/x
  3. Step 3: Cross multiply
    61,064.85x = 91,601.73 × 18,939.60
  4. Step 4: Simplify right side
    61,064.85x = 1,734,900,125.51
  5. Step 5: Solve for x
    x = 1,734,900,125.51/61,064.85
  6. Step 6: Final answer
    x = 28,410.78

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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.