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Finding the Fourth Proportional to 61,279.77, 91,872.95 and 31,678.73

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Solution

The fourth proportional to 61,279.77, 91,872.95 and 31,678.73 is: 47,493.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,279.77 : 91,872.95 = 31,678.73 : x
  2. Step 2: Convert to fraction form
    61,279.77/91,872.95 = 31,678.73/x
  3. Step 3: Cross multiply
    61,279.77x = 91,872.95 × 31,678.73
  4. Step 4: Simplify right side
    61,279.77x = 2,910,418,282.31
  5. Step 5: Solve for x
    x = 2,910,418,282.31/61,279.77
  6. Step 6: Final answer
    x = 47,493.95

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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.