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Finding the Fourth Proportional to 61,198.88, 91,798.38 and 38,989.89

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Solution

The fourth proportional to 61,198.88, 91,798.38 and 38,989.89 is: 58,484.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,198.88 : 91,798.38 = 38,989.89 : x
  2. Step 2: Convert to fraction form
    61,198.88/91,798.38 = 38,989.89/x
  3. Step 3: Cross multiply
    61,198.88x = 91,798.38 × 38,989.89
  4. Step 4: Simplify right side
    61,198.88x = 3,579,208,738.38
  5. Step 5: Solve for x
    x = 3,579,208,738.38/61,198.88
  6. Step 6: Final answer
    x = 58,484.88

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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.