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Finding the Fourth Proportional to 76,990.87, 106,279.79 and 46,785.89

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Solution

The fourth proportional to 76,990.87, 106,279.79 and 46,785.89 is: 64,584.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,990.87 : 106,279.79 = 46,785.89 : x
  2. Step 2: Convert to fraction form
    76,990.87/106,279.79 = 46,785.89/x
  3. Step 3: Cross multiply
    76,990.87x = 106,279.79 × 46,785.89
  4. Step 4: Simplify right side
    76,990.87x = 4,972,394,330.23
  5. Step 5: Solve for x
    x = 4,972,394,330.23/76,990.87
  6. Step 6: Final answer
    x = 64,584.21

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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.