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Finding the Fourth Proportional to 73,920.78, 101,890.85 and 57,759.84

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Solution

The fourth proportional to 73,920.78, 101,890.85 and 57,759.84 is: 79,614.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,920.78 : 101,890.85 = 57,759.84 : x
  2. Step 2: Convert to fraction form
    73,920.78/101,890.85 = 57,759.84/x
  3. Step 3: Cross multiply
    73,920.78x = 101,890.85 × 57,759.84
  4. Step 4: Simplify right side
    73,920.78x = 5,885,198,904.66
  5. Step 5: Solve for x
    x = 5,885,198,904.66/73,920.78
  6. Step 6: Final answer
    x = 79,614.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.